Malicious PDF — malware analysis report

Static analysis result for SHA-256 7987987670722480…

MALICIOUS

PDF

34.8 KB Created: 2020-08-24 23:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ef31c9752f36a1b15cc2f8978e43a4 SHA-1: 43a426f8858b8b7187dec757def37e09237137e9 SHA-256: 7987987670722480c92ec4d00f1022408412efcc4d843a55caf16f235d0345d1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Becker CPA 2018 PDF'. The presence of a malicious redirector URL indicates an attempt to lead the user to harmful content, likely a phishing site or malware download. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=becker+cpa+2018+pdf
    • http://files.impactcommunications.org/uploads/1/3/1/4/131437362/bafebegu_perovi_fuxumaluno.pdf
    • http://vubikipe.aislinfields.com/uploads/1/3/1/6/131606457/1afd39e52223a5.pdf
    • http://files.southaustinseafoodrestaurant.com/uploads/1/3/1/1/131164556/fowoxoruwaweboza.pdf
    • http://xisizozaw.mathsinquiry.com/uploads/1/3/0/7/130775951/rirozuz.pdf
    • http://files.flourishinpurpose.com/uploads/1/3/0/8/130874101/bapixumi-busurekugeseva-dofixomoxulir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/76458403831.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/50443780894.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/70524136808.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/89211407098.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/jedututujufawala.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/77915487379.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/4213782133.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/29596464635.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/jonubezozekixurokojeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/75781588978.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/tesowigifaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/votopiseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/monthly_horoscope_app.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_off00004933.bin
db59cedbbc851926dae75261dd6595ad434ea87ac407a9801bf2c39df01610f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4933 5572 bytes
font_01_sfnt_off00005c3a.bin
d559c1a3f9395de3af19b30ec5a9d3735bb09980d015c9da5ba4884bf2fa2b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 9988 bytes

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