Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d759e7567d91d4…

MALICIOUS

PDF

80.9 KB Created: 2020-08-28 04:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1391d59a64530db1fd2a9bdf80e4e1e SHA-1: dda766020e5ce6d1976169da7a4ab679d1b402a3 SHA-256: 81d759e7567d91d4f951dc1369546c1389cd99403efeccfa6d6d55178618c7e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded links that are part of a link farm, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a game walkthrough and a URL that aligns with the advance-fee scam lure identified by heuristics. The presence of multiple external PDF links suggests an attempt to distribute malicious content or engage in SEO manipulation for fraudulent purposes.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.club/pify?keyword=pokemon+prism+walkthrough+laurel+forest
    • http://kineg.principaldonacarney.com/uploads/1/3/1/6/131637136/sikedurexituzi-xadujej-medefezasu.pdf
    • http://files.firstchurchnyc.net/uploads/1/3/1/8/131856433/972816.pdf
    • http://xalosoxe.pillows-with-a-purpose.org/uploads/1/3/0/9/130969710/lodijagu_bopomikuxate_jexipofeno.pdf
    • http://files.safetygradelicensure.org/uploads/1/3/1/4/131438641/gitisolisopek.pdf
    • http://files.peacelovela.com/uploads/1/3/1/1/131164476/3368075.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0464/9854/5822/files/dumodeten.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/interview_questions_for_marketing_executive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/dinojufivaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/valiropoviminelezogewoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/root_canal_filling_material.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/80810929168.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/apashe_sand_storm_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0452/7508/7010/files/allergic_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/allowances_exempt_from_income_tax_u_s_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/btec_level_2_applied_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/fadimulivodem.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/mazda_fe_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/baraja_inglesa_para_imprimir.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacf.bin
b36f4537655e8338be71b3a6fccb142e829cae048e9b4c7ad1b597b799a7794b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDACF 5356 bytes
font_01_sfnt_off0000ece5.bin
f4bc9258ea6a066b655413abdb8450c57601dae2f73d968a519b91a973a4cc9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 10428 bytes
font_02_sfnt_off0001107e.bin
ed614ff3ac2e387b3dffe3adc8533a73dd514e171fc201cb60d70b5b5a32e0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 16196 bytes
font_03_sfnt_off00012597.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12597 4324 bytes

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