Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f5a18be460cba9…

MALICIOUS

PDF

52.5 KB Created: 2020-08-14 00:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222c0fdb34f49c400dd93f6777dd88f8 SHA-1: 8ebaa10e386c6e0cc6b65e1e5d3874630ea39c15 SHA-256: a3f5a18be460cba9efe4d0574efce9cf2c9c28ad231773242cb0f973e4f74dac
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links, including one pointing to a known malicious redirector. The document body text, though garbled, contains the URL 'https://ttraff.ru/pify?keyword=kanal+2+reporter+kontakt', suggesting a lure to external content. The presence of numerous links hosted on cdn.shopify.com and other domains indicates a link farm designed to distribute 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=kanal+2+reporter+kontakt
    • http://files.authoravadanielle.com/uploads/1/3/1/3/131381109/8a2a70.pdf
    • http://files.sheilalangston.com/uploads/1/3/2/8/132816036/6211206.pdf
    • http://files.hometowncoffeeandtea.com/uploads/1/3/1/8/131857114/lepokudej.pdf
    • http://files.devinesolutionsiowa.com/uploads/1/3/2/6/132681690/3299649.pdf
    • http://files.stardustscripts.com/uploads/1/3/1/4/131453111/givawidunasegiw-fixufubiwibuwa-zerudiberunes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/92876231612.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/jesazuvufojejofawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/asphalt_concrete_tests.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/59790935283.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/supersize_me_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/business_investment_proposal_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/labepasewosofizo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mejizelomerelunorotuwuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/tejukapowomifopabanix.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/ccna_dumps_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/54541272568.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/duzixidurobodarifukileguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/72945551044.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/rixotimibetegekotaxukami.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_off00006ad9.bin
c03eb3736ccbaf6baadc56aec253186c1b423f40dae77d68c385b8010444695d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 4800 bytes
font_01_sfnt_off00007b3f.bin
920fd53879661762a6dc2bf4d73328375d5352a2d745302a3ff2288466998cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 17672 bytes
font_02_sfnt_off0000add7.bin
1bbfed8e334bb90a5f9d7804257786d4ae38288f3118609b7815268b8043fba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADD7 16036 bytes

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