Malicious PDF — malware analysis report

Static analysis result for SHA-256 16022331c12d52d4…

MALICIOUS

PDF

46.6 KB Created: 2020-08-20 09:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 942d6536d66d6868c8bd551b4ffa6501 SHA-1: c78e9991f6b902b97af0a394938d6b4ff0ba49e2 SHA-256: 16022331c12d52d4166f5062ce770ef26ddb73f747e281448a569ef85acfc83b
162 Risk Score

Malware Insights

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

The PDF contains a lure for a movie download, which is a common social engineering tactic. It embeds a link to a redirector service, ttraff.cc, which is flagged as malicious. This suggests the document is designed to lead users to malicious content or further compromise. The ML classifier also strongly indicated maliciousness.

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=aashiqui+2+full+movie+free++300mb
    • http://files.juliamorizawa.com/uploads/1/3/1/1/131164364/zijapoxema.pdf
    • http://files.lightsoutlet.net/uploads/1/3/0/7/130738622/vekofivom-zukinosukibaxu.pdf
    • http://files.the-emporiumnwi.com/uploads/1/3/2/6/132682210/dizazajedegogakuze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/sofojewedaneriv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/24691164491.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2053/files/accounting_principles_procedures_mcqs_fpsc.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/microelectronic_circuits_7th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/ganokodetivadereladodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/10361709449.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/86197786814.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/bill_check_app.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/vejeletumosepejoko.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/1548117229.pdf
    • https://cdn.shopify.com/s/files/1/0452/1938/1399/files/linear_algebra_multiple_choice_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618b.bin
b0b975d68f2dd720471ed419824cf2011b41ed52a794d8b6bbfef5318c9dbb2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 5456 bytes
font_01_sfnt_off00007419.bin
499713a32c5ff9a762da64f74906b1a9c3b250fe3c2b90c0683b888d3cd90fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 13828 bytes
font_02_sfnt_off00009f9a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9A 4324 bytes

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