Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2acb13ff0825f6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-01 20:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cd5e49c9c415cb249f0e9057b4847b8 SHA-1: d04d55fa7711a79cc308506df261605666bce93e SHA-256: 5c2acb13ff0825f6ed73f1bda553764d1c6940ba63a47eff93f85a6825ac4af4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of linking to potentially harmful content. The ML classifier also flagged this PDF with high confidence. The document body contains the malicious URL, suggesting an attempt to lure users to a malicious site.

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=fetch+api+example
    • http://files.mountainridgefurniture.com/uploads/1/3/2/3/132303099/dazaradubakawipamen.pdf
    • http://files.rachelhammermanart.com/uploads/1/3/1/4/131453989/reginenom.pdf
    • http://files.triandrunfitness.com/uploads/1/3/1/4/131453048/115096.pdf
    • http://files.ctrlaltcrit.com/uploads/1/3/1/0/131070212/fazonanidas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/datum_vs_data.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/12081541687.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/jafuvisobilisagekafixamej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/53508172228.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/vigokedejesib.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/fofilobujuzekuvalexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/66059317780.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/mibulodasagexodelov.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_off00006a32.bin
8b6fe4a784ee0cf1540418e2c09e450b1cf00e7ae8ac9fcece28261209eb2c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 4920 bytes
font_01_sfnt_off00007ad8.bin
0256f8557ee05662e1fca02ea3a43f3112a07b994ec63f1feefd17cd6dc37d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 14616 bytes