Malicious PDF — malware analysis report

Static analysis result for SHA-256 64988bdf9537d9ab…

MALICIOUS

PDF

45.5 KB Created: 2020-08-10 07:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1204ff884223f348c943ccd3d84b6924 SHA-1: 5e91357fa967496bd421713add76123f4bfdca49 SHA-256: 64988bdf9537d9abd686a1953cf09c258bfcd19903bfc55e8710e5883fb0041f
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to financial accounting and a URL that appears to be a lure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm designed to manipulate search results and drive traffic to malicious sites. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly suggest a phishing or scam attempt.

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.cc/pify?keyword=fundamentals+of+financial+accounting+5th+edition+pdf
    • http://mixevor.kimballm7.com/uploads/1/3/2/6/132695569/sinidegilokine_jinumozola_nonifiwonefexuj.pdf
    • http://jesuditum.auntjessiescookies.com/uploads/1/3/0/7/130775162/diwigivajer_gadelo_dezuxiwugikupe_dobepa.pdf
    • http://milide.relationalbalance.com/uploads/1/3/1/6/131637136/966ada5c065f824.pdf
    • http://files.jazzrecordartcollective.com/uploads/1/3/1/3/131379678/8062581.pdf
    • https://digitalcontentmarket.org/wp-content/uploads/2017/11/Solutions-Manual-Fundament
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/47687923300.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/acca_f8_revision_kit_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/xidokozivikivetije.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/10376629255.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/xufufukosagekofemere.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/6199791000.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gagimasakuwipivafenufinek.pdf
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/tifigug.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/paste_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/54771853660.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/deep_ecology.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/guraxivotetamolizanumegit.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_off000064cb.bin
9b142f0d6e02aa410dddb967ba2aa525c9007cb4e7866b894b677eb776b401a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5436 bytes
font_01_sfnt_off00007720.bin
013af0479306a7284392ecc181b3e7319b0630bab5ade5572cfb5739b2903f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7720 10140 bytes
font_02_sfnt_off000099c5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C5 4324 bytes

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