Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb84530f90ba8395…

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 03:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42d393b7da14b84d29dc796f6715f459 SHA-1: 092e2e1c4e5ce7e3c3e888a0b59ecf882b552048 SHA-256: cb84530f90ba8395df98198fc1f42dc00c5330a73caa0b0154c76a0d3eab0df9
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to appear as legitimate PDF documents, but one of the primary links redirects to a known malicious redirector. This indicates a social engineering attempt to trick users into visiting malicious sites. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload.

Heuristics 3

  • 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.
  • 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=categorias+del+materialismo+dialectico+rosental+y+straks.+pdf
    • http://dozetoro.vanderlegal.com/uploads/1/3/1/4/131438641/ladex-wilojudinotij-vunibaxazizu.pdf
    • http://files.inmotionphotographybykarlie.com/uploads/1/3/1/4/131406337/genupugilaz_bozozol_meputexopa.pdf
    • http://files.frederick-biebesheimer3.com/uploads/1/3/2/6/132695586/vojitolusoxup_mokevape_topopelosutuzet.pdf
    • http://jizafu.charlotteshelix.net/uploads/1/3/0/8/130874359/fifuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/ph_of_buffer_solution_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/physics_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/molinoladaxalowizabebut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/wumowipobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/tumazumemib.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/87891394892.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/kovajuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/debatudaxogudalivuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/33127626846.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/coleman_powermate_6250_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/nemiparuwuginotapu.pdf
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/que_es_el_bioplastico.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/optimization_in_operations_research_rardin.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/1/0428/3033/2060/files/optimization_in_operations_resea

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f86.bin
42f6814254d7fa331a72049606f8a1264624e2fb51c298f5479f8617c42c92a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 5580 bytes
font_01_sfnt_off0000727b.bin
7a3395f88fca32edae9a5f8c9ebe52b9c46471e19174aa24a219aa282fe39bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x727B 15288 bytes