Malicious PDF — malware analysis report

Static analysis result for SHA-256 7334a07ba1134fa1…

MALICIOUS

PDF

51.2 KB Created: 2020-09-19 02:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b491c9d4d96d2beb55899b171f0dfb SHA-1: 30fd049bebf683c3423e1aac208c80704ef4c242 SHA-256: 7334a07ba1134fa1e9a85a3f3f35039f27c52ea8a21090867f7207752511dbe3
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.me/wix?keyword=lost+person+behavior+data`. The document's structure and the presence of many external PDF links suggest a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=lost+person+behavior+data
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/doz_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/yamaha_outboard_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/tv_guide_usa_fox.pdf
    • https://7ce7bb4c-e4c5-47a9-9257-c363f07976f3.filesusr.com/ugd/baa514_1a7f9ac596b742788caf731df99b8aba.pdf?index=true
    • https://33f67a51-94a8-4ce2-9481-50156b7e7100.filesusr.com/ugd/b3bc21_04bd0bcd07e14b34bb5ae7e90a96d910.pdf?index=true
    • https://a9580347-287c-405b-920f-bf29e06b6bf0.filesusr.com/ugd/f08e01_a963130c5cb24f388b8b82f65c7fdd6f.pdf?index=true
    • https://db184d31-1b34-4b42-9bf8-4c173b95678f.filesusr.com/ugd/c79b1c_4bce351261344b30b24509bebe51788f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/zajonoroparunegotevuxar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/free_ebooks_learning_russian_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/17965888116.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/zawifinogefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2629/files/14668538103.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/iifa_awards_2015_full_show_480p.pdf
    • https://cdn.shopify.com/s/files/1/0431/0561/6029/files/goldsmithing_ffxi_guide.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_off00007d36.bin
dd1d4d840064a9626449be58afba09b65f4b4ac7bf0f2fb23b652cca76fb184a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D36 4944 bytes
font_01_sfnt_off00008df7.bin
9b9457f1df9c9da4644071d5151911893b089ea70b02a9d228f0cc076414f3b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF7 10580 bytes
font_02_sfnt_off0000b223.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB223 4324 bytes

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