Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bab879a9583d70…

MALICIOUS

PDF

37.9 KB Created: 2020-08-24 23:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8406e85808bf5103fddee843ed191414 SHA-1: 01daa5ba34377d5589e7ebf7a8ed78a34f08d212 SHA-256: 73bab879a9583d703cf8b4a34dabebf06f631b8b969ac63bccac1aa57cf99b17
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Ikea bed sheets qatar' and a URL that is part of a link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ikea+bed+sheets+qatar
    • http://ganube.multifaithstorytellinginstitute.org/uploads/1/3/0/7/130740609/sigimaxedo.pdf
    • http://files.innerstateproductions.com/uploads/1/3/0/7/130775823/3f66de3b25df.pdf
    • http://files.jameridian.com/uploads/1/3/1/4/131406605/bec140110410ea.pdf
    • http://nojif.howesenglish.com/uploads/1/3/1/3/131383664/7650d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0462/6812/1237/files/bimemaduwofuxinoxoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/76125272970.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/30288362735.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/29018585207.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/sokotobi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2243/files/kasoxiponogisujitibafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/tifejidewok.pdf
    • https://cdn.shopify.com/s/files/1/0462/5081/9733/files/android_admob_test_ads_not_showing.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/xuzutesuxasotig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/59995407012.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/medical_tourism_questionnaire.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_off00004af9.bin
25598106e0ad16aef1704d5f2d51bbae0f05fb31fb689eed984d92cdc0fcbec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF9 4672 bytes
font_01_sfnt_off00005ad1.bin
82a3ec1136a39d0ceb26479aa4c1256df3a8fd18f8f58dacaad511a728d22c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 9956 bytes
font_02_sfnt_off00007ce1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 4324 bytes

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