Malicious PDF — malware analysis report

Static analysis result for SHA-256 003cf8fd93be6e5c…

MALICIOUS

PDF

53.7 KB Created: 2020-08-21 21:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9671bf5341cd987fe496a687af63726 SHA-1: a771e99e415ad63b2aedec1350e92134ec82227d SHA-256: 003cf8fd93be6e5c671966e75dd3c11971c26bb12c9e9246c1c8e78a31a6c749
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially garbled, includes the text 'Abyssal demons melee guide' and the same URL, suggesting a lure to disguise the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or distributing further malicious content.

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=abyssal+demons+melee+guide
    • http://files.seashore-house.com/uploads/1/3/0/9/130969754/0de76.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/78970563481.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/fedefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/52011575964.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/update_android_oreo_s7_edge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/69632289406.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/28634985443.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/las_cloacas_del_periodismo_reportaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/jiretirererigolam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/kimoluzorasowixowat.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/fesimuboj.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_off00008a53.bin
18bb474858892aac7e45647beefd6861e76bea4def75d5667ca737765feec4ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A53 5280 bytes
font_01_sfnt_off00009c35.bin
c28280e883700dff5edbfb3c40a36c19908c1f3d04f00f401e7e7eccf921c03d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C35 14932 bytes