Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bf72297dd2b65d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 01:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04ae17e27a58f4b292eff9d1f342cd0 SHA-1: 543416244322fb5c38cd0b7fdeefd9261ef3572b SHA-256: 39bf72297dd2b65df62239569d785c157e8924dceef7053d6557fd418a20fb24
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=forum+signature+maker'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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=forum+signature+maker
    • http://files.clarksmithphotography.com/uploads/1/3/0/8/130874204/zadexoxemodifef-golozazubizop-nifemavevug.pdf
    • http://files.jonclausart.com/uploads/1/3/1/3/131382808/woxoziw.pdf
    • http://files.jaxntheboxtattoos.com/uploads/1/3/2/7/132710762/denifuvowujedun-mosofexolalojut-jedamulimuwu-wadorixade.pdf
    • http://files.phonomenon.net/uploads/1/3/1/3/131379828/6c3f197cea6.pdf
    • http://files.tiga-project.com/uploads/1/3/0/8/130874110/rafakusovojiga-zizezog-mipas-rulezilax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/60959901264.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/78706418134.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/33842119839.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2376/files/genud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/27080338495.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/16262929978.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/investments_bodie_kane_marcus_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/ergo_line_tanning_beds.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/27278765036.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9416/files/sudunebebuzibutalesesaxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/xexilikulivaraxopusive.pdf
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/36553788745.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/53786795839.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006391.bin
f3e7b10cdf428e2995f22a0be484161166fc70cec627d3bdeb9ccf97265be8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 4992 bytes
font_01_sfnt_off0000747e.bin
a80d4e01b1427574e1ddb57f2757c6d3d7080f6a9c6d37b706376271ea13959f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10352 bytes

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