Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1afdf12a83bf2b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-12 02:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb3219f062dc97e30e8cf54296457e1 SHA-1: 36e73699c1522bdff43b3101f768413d7df0a41f SHA-256: 0a1afdf12a83bf2b18f62fbef7d921fb3399ff99b9798e978c853071088d5bfb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific execution chains.

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=que+es+contexto+familiar+pdf
    • http://files.kelliharrod.com/uploads/1/3/0/9/130969700/cc955728facd85.pdf
    • http://files.whiteglovetreatmentllc.net/uploads/1/3/2/7/132710779/dodutozuboziparig.pdf
    • http://vezer.naileditdoc.com/uploads/1/3/2/8/132815002/fasazanarogu.pdf
    • http://files.esandelle.com.au/uploads/1/3/1/4/131408970/jasazozadixuro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/89883630431.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/werewolf_boy_eng_sub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/interactionist_theory_of_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/davipiwebatubofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/fufuvajizemuziv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/watosezinebagujajunamo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/43216921573.pdf
    • https://cdn.shopify.com/s/files/1/0435/3422/1466/files/bikogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1045/files/gonowukasoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/neviwevixuwigaximi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/kifujirovibawiwapevex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/pasezanafijipila.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/variables_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/nogexaxetizitirimona.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_off000065e0.bin
1212864c3bf75ed8a72d4edd9af3b34dc66d2f477ceeddc65c96a275b0414b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E0 5432 bytes
font_01_sfnt_off00007841.bin
41f7cb415da732b61ef4a46f09d95a0fa8b2fef3f88645514f836259d6d425e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10972 bytes

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