Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aacd5d2ae24b0e6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-31 08:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640af384aa0477279bc38f8560a31153 SHA-1: a29e249210adcbab83078a4f698dea1f3193bcb8 SHA-256: 5aacd5d2ae24b0e67780cb004efb1b0e7c0de2080931d27465004ec017aeb720
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for traffic. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wix?keyword=fnaf+2+ending
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6350c7_96fc81f4878240e18178d1d0c6fb134c.pdf
    • https://static.usrfiles.com/ugd/837d34_465673c6d85c49c7b105523715cd7c9d.pdf
    • https://static.usrfiles.com/ugd/1cc777_ef053d78354b4a38b52c1031ca3081dc.pdf
    • https://static.usrfiles.com/ugd/8acad3_dfb87b28fb204ac89d848a692936c519.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdb8c915d5d04509a775216ffb8b7c2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1379859d0ae04611b2704b36c748368c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/funny_tts_lines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/nivodigis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/pupowedevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/mosudeliveduladej.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/capitaes_de_areia_baixar_em.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/music_genre_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/common_spelling_rules.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007464.bin
6b51a0fc375a72f55e05ca1b7621a7e471967229e07506c1e8a8f8cb4915922a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7464 4452 bytes
font_01_sfnt_off0000838d.bin
2e3772104fbf3474477b6f4a612e0b464726e2f5f5ddb5c08297df7c4ed852f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 10332 bytes
font_02_sfnt_off0000a6ee.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EE 4324 bytes