Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b63b2847ae2afca…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 18:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2fceb45d86e934e717595aa14f8784c SHA-1: 88477cb2e0a476a92fea8583b5a0dafde45781f8 SHA-256: 0b63b2847ae2afca7ebf648e723e3de065fea3dae1ff1cf9bbfd5fbab5baf52b
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=police+collision+reporting+centre+oshawa`. The document body, though heavily obfuscated, appears to contain text related to the link's apparent lure, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=police+collision+reporting+centre+oshawa
    • http://files.chickswithdecks.co.uk/uploads/1/3/0/8/130874369/fc982370cb6.pdf
    • http://files.shopbottledwaterdelivery.com/uploads/1/3/2/6/132682745/1522676.pdf
    • http://files.accessibleveganadventures.com/uploads/1/3/0/8/130874633/2531194.pdf
    • http://files.moonlightweddingservice.com/uploads/1/3/1/1/131164520/sebominex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/delete_meetup_account.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/alistar_support_s6.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/catalogo_ambev.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/50051526722.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/vituka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/91621904611.pdf
    • https://cdn.shopify.com/s/files/1/0445/6851/0628/files/iowa_state_highway_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/bewelekalefebajeneneb.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5637/files/vivagebexugosideg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9551/files/al_quran_ul_kareem_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/55142770651.pdf
    • https://cdn.shopify.com/s/files/1/0448/2147/9584/files/vivovegevijolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/7967311516.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_off000062d2.bin
489beb6fb3b193f09b02debab072459a0f523aee0157e863162a4b7fb9568058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 5288 bytes
font_01_sfnt_off000074cf.bin
07e38d5b6e29a26722da976f9b9f4940dfae98897ab8c08181273a33b1f1cb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CF 10416 bytes

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