Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c667d2a77e1e29…

MALICIOUS

PDF

45.9 KB Created: 2020-08-12 20:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777ff74e6fefb3083234ae50cce433c7 SHA-1: cb323dc3a87c7aff6a8a72963e83b8f1a3a82edb SHA-256: 18c667d2a77e1e291f39d5d8ce483d1c320dc854bf5124be10c56ecb7a1cac6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious link identified is 'https://ttraff.ru/pify?keyword=autocad+pdf+export+blank', which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious sites. No scripts were extracted, and the document body's content is largely unreadable, but the heuristic firings strongly indicate a link-based redirection attack.

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=autocad+pdf+export+blank
    • http://karabax.msreevessaltus.com/uploads/1/3/1/4/131453247/300f5226e4a.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://files.jessiesfitclub.com/uploads/1/3/2/7/132741556/wamezo_segana.pdf
    • http://files.robertnoonanartanddesign.com/uploads/1/3/1/3/131380120/7802518.pdf
    • http://nagej.leighkotsilidisart.com/uploads/1/3/2/6/132681352/juromalemesifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/idontwannabeyouanymore_chords_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/69386165547.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/zombie_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/37514490626.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/83454648652.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2158/8888/files/1801361500.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/widoxenemisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/72886022931.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/retained_placenta_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/confluence_vs_jira.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/17983560049.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/string_theory_equations.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/rusuwatafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zadupixoliko.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_off00006631.bin
d3a16f6e117b2104972e41d94ef73e8fd236dd190ccfc2eb27eb43a52b1bb6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 3936 bytes
font_01_sfnt_off0000745b.bin
b849982cf3dc775b9352d73c6e80ca8f725291e6ba87ef656209645b48c391c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745B 5232 bytes
font_02_sfnt_off00008634.bin
b0e6da800aaa810f3b01ee11853531726164bbc4af6f4d541b98aa807cde0d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 10512 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.