Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc7eaaf22d38a3e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-18 14:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a14db08fb98edf4dd3f736b11fcabd4c SHA-1: afae3895b7ed154ef5596a9fe1865f620ea466ba SHA-256: 0fc7eaaf22d38a3ed527866699d5e934ae514afbef09cbbb6cc9fc87e1234acc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, contains text related to 'adding integers free printable worksheets' and includes the malicious URL, suggesting a lure for users seeking educational content. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=adding+integers+free+printable+worksheets
    • http://mometu.bagsofnaturestore.com/uploads/1/3/1/4/131453060/wefanotigowix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/29173743416.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/kuzedaxarajedarifila.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/bureaucracy_theory_max_weber.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/58979980570.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/genesys_works_tsheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/jopedabaxemilabaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/riderisevusoponetex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/96933078580.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613c.bin
6c1fa1738d081de4dd2105bff905aec27202986d69acb914cc3c179304d1e560
pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 5588 bytes
font_01_sfnt_off0000743a.bin
ef25f8f471c2d3d9845353d775d54268c73d595c7e799ab0daf464c077225663
pdf-font-stream PDF embedded font (sfnt) at offset 0x743A 10144 bytes