Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1fce35669013f1…

MALICIOUS

PDF

45.3 KB Created: 2020-07-28 08:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2634c950aa8534ee2b53df61c27baa6b SHA-1: 98144d8ce1eb79343a388adc97e1b891f401e4b1 SHA-256: 2c1fce35669013f1e268cb5ca348c3980ca83267319301d02472f2cbb233125d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru), and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to 'critical ops latest hack apk', indicating a phishing or social engineering attempt to drive users to malicious sites. The presence of a link farm further supports the 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.ru/pify?keyword=critical+ops+latest+hack+apk
    • http://files.clarencelam.com/uploads/1/3/2/7/132710596/9871799.pdf
    • http://files.ccydnehobbies.com/uploads/1/3/1/3/131382092/muxukonil.pdf
    • http://files.logcabinrental.ca/uploads/1/3/2/7/132740763/68ae91ee501d.pdf
    • http://files.jemoweryandsoninc.com/uploads/1/3/1/6/131607407/fixabokagunuzenibufi.pdf
    • http://files.serenitysoundhealing.com/uploads/1/3/0/7/130776674/7311499.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/zurigafuxitofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/20309202549.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/26925064247.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/74111130110.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/lixexebizovimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/padolojurokagulipar.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/48514987178.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/jewekaperozomeji.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/sekinapasukelizurusojof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/1850399155.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/178766864.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/27775245023.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/82939719091.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/
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075a7.bin
432aaf116f1c5a0066ffb5b68ff6d9c51303797382e0615cc894ff1342bf3779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A7 4788 bytes
font_01_sfnt_off000085f9.bin
b7f89f3917810667fc739a916446bf4791d482eb95a2dcfd37b0a827845a86c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 9856 bytes

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