Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa6dc198a4d530b…

MALICIOUS

PDF

49.4 KB Created: 2020-09-07 09:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ea8755e01bcbd161a22149dd5dda73e SHA-1: d4f9f35396fe284e936f9e07ea59f655ab9f7e20 SHA-256: 4aa6dc198a4d530b323c23adc057795c33071a5b0492866bba8db776657aa495
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links designed to create a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=logarithms+exercises+and+answers+pdf', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of many benign Shopify links is likely a tactic to mask the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=logarithms+exercises+and+answers+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5332/6241/files/export_to_excel_spreadsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/artemis_fowl_the_last_guardian_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/10358456385.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3d7af5_a60526ed89eb48d3aca0f31b2be1316b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e6092c_4526bb7a1f064673a47002f700abf17d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_042498167b554e96843dbf8d650c7ed6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a7407_607beb2df3174293887003a9b3a7755a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/957c7b_d22f2367f2aa4c438189b4efcc6bea55.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97aff7_c75d7134a67d45f3add26ca55c5742a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ddb60a_38deb964be1a49aaa5da5fa57ef689ab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b16523_7c1bf7c0599c4cb4b5502fe26156d86f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/aged_bell_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/81632340160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4029/2520/files/fefivegirikix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/blended_vowel_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5347/3189/files/wipidatatikinimizopapew.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 5640 bytes
SHA-256: 0c0f396c37c40b72268d12f26343ff8de9d1ca992bc89a8b40b1445020b372d8
font_01_sfnt_off000077e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 13588 bytes
SHA-256: f285ab16156101b5e748186c303c1da33278885138bbcc9c90869b05c2e01372
font_02_sfnt_off0000a2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A2 16128 bytes
SHA-256: d44d52ef66720e7299aa23375668eb807971917d9a72a2eac4a2c392e38f6666