Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97320f435537cfa…

MALICIOUS

PDF

66.5 KB Created: 2020-07-10 10:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38bb98ef5dd5f4bf9ee6688cdb1902bc SHA-1: 4029815d06c7f5ab1ca63b46b14b1b3459eb2e1a SHA-256: b97320f435537cfab782cb029ee181aecdb7962d7c44ee437f00420826b95866
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with the primary redirector identified as ttraff.cc. This infrastructure is known for malicious redirection, and the document body, though partially garbled, contains the same URLs. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed to lure users to external, potentially harmful, sites.

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/wb?keyword=kabir%20dohe%20pdf
    • http://files.3dotdash.com/uploads/1/3/2/6/132681293/4409742.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.findyoursoulshine.com/uploads/1/3/0/7/130775940/fca57a1.pdf
    • http://files.gentlesherpherdfellowship.org/uploads/1/3/2/7/132740415/mokup.pdf
    • http://files.apachetruckclub.com/uploads/1/3/1/4/131438611/zemesenonow.pdf
    • http://files.coachgaryedwards.com/uploads/1/3/1/0/131069890/pepagumogu.pdf
    • http://files.terrymcgrawphotography.com/uploads/1/3/1/3/131398182/6319721.pdf
    • https://pipupuza.files.wordpress.com/2020/06/58424270893.pdf
    • https://lunulaxoxo.files.wordpress.com/2020/06/pugenufapada.pdf
    • https://xukitivusapu.files.wordpress.com/2020/07/59152988514.pdf
    • https://tavobav.files.wordpress.com/2020/06/14742882451.pdf
    • https://govabivivuz.files.wordpress.com/2020/07/80650691611.pdf
    • https://rejukuvis.files.wordpress.com/2020/06/sozijaremiwus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.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_off0000ba8a.bin
02f6da110f751c10f1f23dd0b7b55d5891e508b14f7d98a0865eecf1bdf9a9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8A 4628 bytes
font_01_sfnt_off0000ca51.bin
dab1e387ef913dc450844d09be41c89123dd6f2505784b26abb85b66ae2371f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 11024 bytes
font_02_sfnt_off0000eeeb.bin
d6637287aef464c37fd8895bee838f5a637e68cfb4b9f8951b27c9c357133606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 3652 bytes

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