Malicious PDF — malware analysis report

Static analysis result for SHA-256 8554bc6fad664dc0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-04 18:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e4a295a1c63cac07919e6a44c38f1c6 SHA-1: 4e72f42565d0e1c44dddecf41f12a6a60ddeeff6 SHA-256: 8554bc6fad664dc02a9a8a4608bb18897f28232a8581fe632fe1722401742265
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Bosch invented for life'. The primary malicious URL identified is ttraff.ru, which redirects to a payload. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation to distribute the malicious content.

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.ru/pify?keyword=bosch+invented+for+life+pdf
    • http://files.reikiwithjane.com/uploads/1/3/0/7/130738765/zunosofun-lukali-fusokedigapugid.pdf
    • http://files.selahtechnology.com/uploads/1/3/1/1/131164556/40ad1465.pdf
    • http://files.mchsapchemistry.com/uploads/1/3/1/4/131406222/taxodupebutejafud.pdf
    • http://files.sidneyboothill.com/uploads/1/3/0/8/130873798/zinexututaz.pdf
    • http://files.jenndowd.com/uploads/1/3/0/8/130874658/5744974.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/lobakinamitin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/musokonavemoxib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/guxumeriravo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/wabuwidojunaxukigasix.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/92999956207.pdf
    • https://cdn.shopify.com/s/files/1/0433/9826/7029/files/pink_floyd_pulse.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/29765066897.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/sejojezafi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1560/9252/files/free_mom_son_porn_comics.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007108.bin
8b75a9034a0a458e07141e28660d79685e53895c3768c122a1c76aec88c86599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 4928 bytes
font_01_sfnt_off000081c2.bin
53fc96f15b8b0e716d982d4034f54572b7062a91244e3b6735022c9d5049981b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C2 10260 bytes
font_02_sfnt_off0000a4eb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EB 4324 bytes

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