Malicious PDF — malware analysis report

Static analysis result for SHA-256 102cd841fda1666a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 20:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55025b5af2a1fe3008b17e5c9e68ff57 SHA-1: c17b3dda99fac90adc2543dce2db661cb5364bed SHA-256: 102cd841fda1666aa0fc79fe8054daa9e32613e79d163e164eeec98a5891e5d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=nice+guidelines+on+diverticulitis', which is flagged as malicious. The presence of numerous links, many pointing to external PDFs, suggests a link farm or redirection tactic to distribute malicious content or engage in SEO manipulation.

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=nice+guidelines+on+diverticulitis
    • http://dalos.nurturingsprouts.com/uploads/1/3/1/4/131438079/sewufi_nelisokuvil_lixevus_sijoruvimezikup.pdf
    • http://files.teamroyalty1990.com/uploads/1/3/2/6/132682862/tafefurosavedubijoze.pdf
    • http://wukune.schoolcafeclub.org/uploads/1/3/0/7/130740069/1f4c5e339.pdf
    • http://files.christineshanks.com/uploads/1/3/1/4/131437982/6064072.pdf
    • http://files.acupunturavetbarcelona.com/uploads/1/3/1/3/131398019/jamuwesatal_lejuniga_rigozuvuva_fezel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/dojofemeserero.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/jajadiwem.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/turk_film_torrentleri.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/carmelita_divinagracia_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/pkhex_for_switch.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/81392462035.pdf
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/jixejugoraveposaxabum.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/50081835158.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/my_sister_s_keeper_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/fable_2_silver_keys.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/wosuwovamuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/58449614358.pdf
    • https://cdn.shopify.com/s/files/1/0452/1974/1856/files/ecological_footprint_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/kidavaso.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_off000067a6.bin
6882ba7ff88dc737187d754f95e9529818ecb818b181409f20d6546d38822c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 4808 bytes
font_01_sfnt_off00007814.bin
b778c1d7684e7ea96f1852119efc6af758903b763332c4a3c1f18e9ac65db254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7814 10240 bytes
font_02_sfnt_off00009a90.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A90 4324 bytes

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