Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1a23301683b3bd…

MALICIOUS

PDF

44.3 KB Created: 2020-08-24 16:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07baa157a26f83dfb2c21994faf2643a SHA-1: 46c8ead0ddc872941837cfdaa0f60ce7da09e092 SHA-256: 0b1a23301683b3bdb961db7362ba4d42e406074bca76a0cd44a2ea0c3f69578f
162 Risk Score

Malware Insights

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

The PDF contains a lure for 'Call of Duty Mobile beta apk data' and embeds a link to a redirector (ttraff.cc) that is flagged as malicious. This redirector likely leads to a malicious download or phishing page. The document also contains a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=call+of+duty+mobile+beta+apk+data
    • http://files.halleluyahfire.org/uploads/1/3/1/6/131636914/aad05c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/tojibawot.pdf
    • https://cdn.shopify.com/s/files/1/0436/2321/9363/files/iphone_dns_bypass.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/93636168393.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/honorary_citizen_certificate_template.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/dieta_balanceada_para_diabeticos.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/38783837954.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/auditory_scene_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/duwededotizomexivudofuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/acta_constitutiva_empresa_constructora.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/95361974896.pdf
    • https://cdn.shopify.com/s/files/1/0430/6475/4325/files/37577283462.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/80116612643.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/90920898493.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_off00006958.bin
39511f52b7b57400995e0e7fccfadb6b159b2286b98a03700b88e41fa83f3bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 5124 bytes
font_01_sfnt_off00007ac6.bin
a3b18fba60bd4e0aae3ec30a3278aa2ca8bb4d648df3e04025f10fee9d626820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC6 12760 bytes

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