Malicious PDF — malware analysis report

Static analysis result for SHA-256 d061c5d813c445d4…

MALICIOUS

PDF

52.1 KB Created: 2020-08-14 13:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09c83ab6df0bc1d725becd02ea848f89 SHA-1: 0fb6b9a26bec2e1ac084d076e00c458abc45214a SHA-256: d061c5d813c445d4d320546f961340da0e41b16ee7b091b9de151009430adbe8
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=best+small+android+smartphone+2019'. Additionally, it features a link farm with numerous URLs pointing to PDF files hosted on cdn.shopify.com and other domains. This structure suggests a phishing or scam attempt, leveraging SEO techniques to distribute malicious links. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and link farm strongly indicates a malicious intent.

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=best+small+android+smartphone+2019
    • http://files.strettoyouthchamberorchestra.org/uploads/1/3/2/8/132814935/vukujezi.pdf
    • http://files.robertthorntononline.com/uploads/1/3/1/6/131606261/lenejiwasaluvanewu.pdf
    • http://zujewuwi.laneanimalhosp.com/uploads/1/3/1/3/131398404/bejum-sadepinekiz-podetevuxasexud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/sega_genesis_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/metawixaxabewufoziwipavaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/vonijazagiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/10776615335.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/rebajumimajixiwila.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/jet_engine.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6175/files/65072912864.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9928/files/lanolumovetam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/jifanigez.pdf
    • https://cdn.shopify.com/s/files/1/0440/4746/6661/files/algebra_nation_section_9_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/21642023154.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_off00007f77.bin
6edbc0b85b6b247852d6bbaee2d04987977a4ed2f13d92431d7d656489d7141e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 5520 bytes
font_01_sfnt_off000091fd.bin
b7642c94f4f5ffb8a77a68fb22a041b0d1598635f6b34285652d56285be7ca0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FD 10484 bytes
font_02_sfnt_off0000b58d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB58D 4324 bytes

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