Malicious PDF — malware analysis report

Static analysis result for SHA-256 323f6633b5c98931…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 00:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d552ba90cf8f239d4deb1e6abd68e57c SHA-1: d9044ff030bd4d33221ae9f79e0b38c35f47472d SHA-256: 323f6633b5c989314e737db290a1893c6659bf322bf7205912549af608253318
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a 'competitions guide premium review'. This indicates a phishing or scam attempt. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm used for SEO manipulation or to obscure the final malicious destination. No scripts were extracted, but the presence of the malicious redirector and the document's content strongly suggest a social engineering attack.

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=competitions+guide+premium+review
    • http://jujomo.cdheducationalcenter.org/uploads/1/3/1/6/131607131/jozafi_mirax.pdf
    • http://files.onemomentofpeace.org/uploads/1/3/1/4/131453847/3722995.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/negavevitebaxigafosolib.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/79168106327.pdf
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/16813967733.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/17785719710.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/45778252504.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/56084781384.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/63533933271.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/8402616340.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/tariwezamori.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/atul_purohit_garba_album_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/paseb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5674/1022/files/alcoro_online.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_off0000599b.bin
32d9f89ae8eb18dac96650c7fabfdf0302a4c42e7570d58d31c0b719777a50a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599B 5092 bytes
font_01_sfnt_off00006ae2.bin
da443f377ba7bf6d6ed59ceb5b3735fa4655c246c92a5b3c386b23ae66b93191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 10528 bytes
font_02_sfnt_off00008edf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDF 4324 bytes

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