Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f26ad013e9fd24…

MALICIOUS

PDF

94.6 KB Created: 2020-08-18 21:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f0b13be184a76c010bbd2fe479c1ff SHA-1: f4ff8417ce6d521223c72f3b4184241d24ee46e8 SHA-256: d8f26ad013e9fd24854a0b903f0621cbf696236f7d94d6f86f0c8d6981562969
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.cc, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a likely phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer the attack pattern.

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.cc/pify?keyword=lion+air+610+final+report
    • http://files.purejoyfarmsmn.com/uploads/1/3/2/7/132711966/19b243b3e7.pdf
    • http://files.vanessanbrown.org/uploads/1/3/0/8/130814284/1031845.pdf
    • http://files.juliakellerbassist.com/uploads/1/3/0/8/130814225/vevesozepumi_pivujudemi_zumakaje.pdf
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdf
    • http://wuxila.leaddeadwoodartscenter.com/uploads/1/3/0/7/130775971/9002330.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/international_business_strategy_articles.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/titowewagunufanuwilovex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/58731922960.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/mass_gain_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/captive_2015_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/o_budismo_esotrico.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/lenifizofare.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/33972697240.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/82807596581.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/female_endomorph_diet_and_workout.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/convert_arabic_to_english_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/mazizok.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_off0001285b.bin
908b1d0800ad35935033c18d790aba3e56cbf87be7146aadd04954a06d3dbea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1285B 4796 bytes
font_01_sfnt_off000138a4.bin
1a6a79781cde5789e6869933310f588ee5b695c5396ee9239a0e11dc6c20c294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 11344 bytes
font_02_sfnt_off00015e95.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E95 4324 bytes

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