Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cc2ec559b584f3…

MALICIOUS

PDF

48.8 KB Created: 2020-07-31 10:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fccca45341866954db8d4eebb184c74 SHA-1: f31674ce2732b0300a2a22f95cfbfa53729b42a1 SHA-256: c0cc2ec559b584f3270c3be566a4c0f0834a7e5bcd1a8957f24d2f2e7458faf1
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous external links, predominantly to other PDFs hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=api+rp+527+pdf', is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a malicious redirector suggests an attempt to lure users to malicious content, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=api+rp+527+pdf
    • http://files.onbradstreetfarm.com/uploads/1/3/1/4/131406412/28598c2e7.pdf
    • http://files.islandhillfarm.ca/uploads/1/3/0/8/130813643/9566384b.pdf
    • http://files.quickstitchplus.com/uploads/1/3/1/4/131406222/4713347.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/nebuxotuxapoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/rutafiradevixukugul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/95674416108.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/sujomuladulevenafatudaked.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/tawavolal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/28191831449.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/pewizesoborofen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/jexozisi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/subuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/20704053371.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_off0000862e.bin
90e6a04640d25af28ca680f39967e508265079f2f032088329e44447931eecd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 4312 bytes
font_01_sfnt_off000094dc.bin
4f299588959802ca4e9d7175877c0baa6cdc0ba2b5f85bfd733ca864c70fe2b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DC 9724 bytes