Malicious PDF — malware analysis report

Static analysis result for SHA-256 847727796a336e53…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 05:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213d67315e06efc50694680a6b3d432b SHA-1: 97aa252edcdb6611305ba915b53858702c41ae92 SHA-256: 847727796a336e538158f504a96e4c117c4bda3361bf0e9388a8344874ea2d6a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site. The ML classifier strongly indicates maliciousness, and the PDF structure with numerous links aligns with SEO spam or link farm tactics used to distribute malware.

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.com/pify?keyword=atmega8+microcontroller+datasheet+pdf
    • http://files.bowlermedical.org/uploads/1/3/1/3/131379781/2803418.pdf
    • http://files.a1-therapy.com/uploads/1/3/1/6/131636702/nazovotidiludat.pdf
    • http://kofozesa.psychedelicsmadnessawakening.com/uploads/1/3/1/1/131164250/8402300.pdf
    • http://waxuximaj.mothernoble.com/uploads/1/3/1/6/131607163/poxitilopat.pdf
    • http://files.hummingbirdmedicineboise.com/uploads/1/3/1/4/131437949/nofomibepopetosaxa.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/how_to_fix_rimworld_1._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/52507020207.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/michaela_schwyhart_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/98253305700.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/52141629973.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/linetuxomizolebava.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/73996724684.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/zovonitopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/6046665087.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/xosurim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/47123237567.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/97790607559.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/70178339545.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/inductive_and_capacitive_proximity_sensors.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_off000067c9.bin
de0ba63a6dfdc6cbfee0b1d5f09e03b27045519c1303e2f2e2c34c223f7f29fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C9 1560 bytes
font_01_sfnt_off00006fc6.bin
30d173a668bbf71c8a2b57c2716925fb2ae8a15848a22737d75674e302f7fa5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 5752 bytes
font_02_sfnt_off0000832f.bin
022c5b0971b5ede40fc64c18781458174eb392ff61791dd73b4adbc3ddf11316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 16020 bytes

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