Malicious PDF — malware analysis report

Static analysis result for SHA-256 0014c80ce0ea9449…

MALICIOUS

PDF

32.6 KB Created: 2020-08-29 11:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f41a955466fb85b8395cf5209c3d93a SHA-1: 2af94c545f31326b9119604a0559d80da3c97ff8 SHA-256: 0014c80ce0ea94493d4fd51e8040e66c1aaaad0b287195e95367b5adce3ee9be
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content.

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/wix?keyword=c+est+pas+sorcier+la+renaissance+que
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4411/8428/files/6763127253.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/rogogituxodamudixel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/fugipeludize.pdf
    • https://cdn.shopify.com/s/files/1/0438/9234/2939/files/automata_theory_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/spread_offense_run_plays.pdf
    • https://cdn.shopify.com/s/files/1/0457/5297/5516/files/fixadobipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/klipsch_ksw_12_subwoofer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/simple_letter_drafting_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/basics_of_civil_engineering_ktu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/spider_man_comics_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/2020_aha_bls_for_healthcare_providers_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000421f.bin
18719e08afa8c98c8ada59256337355ec128fd35fd569dd7a62f6e8bb69bed2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x421F 4960 bytes
font_01_sfnt_off00005306.bin
32d49146f8d2ff2e0d2016fc04bb885a7d001e7c980603ca98233a8936490dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5306 10216 bytes