Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad964961e30029a…

MALICIOUS

PDF

38.3 KB Created: 2020-08-15 00:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 970b2370be54d7363c7342f34ce9f8fd SHA-1: 59e7510c958f624205fd85e580219f35e0fda588 SHA-256: 0ad964961e30029ae7e64658c41ad4ed776aef00179eeca00d9f4a66900127ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=atmosphere+layers+worksheet, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise 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/pify?keyword=atmosphere+layers+worksheet
    • http://files.lovolutionofkindness.com/uploads/1/3/0/9/130969454/bbfe830e5e9cb5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/canon_lide_220_scanner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2491/5359/files/clinical_cardiology_made_easy.pdf
    • https://cdn.shopify.com/s/files/1/0449/5107/7032/files/wewobebuvobawuvirilarizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/mukob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/marketing_research_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/84866918034.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/math_puzzles_brain_teasers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/damaxetulolijisudutusoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/baby_boomers_generation.pdf
    • https://cdn.shopify.com/s/files/1/0449/3754/3848/files/xufotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/afsaneh_najmabadi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/xitutakosolujenukuzikip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/68527248523.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/14188873438.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_off000057c1.bin
dd00868857d86e44f442adb6f0b13bba3e4840b9f93f5203650e6d131cb83876
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C1 5308 bytes
font_01_sfnt_off000069b9.bin
9d13a552d57bd3a34b8cb08af7e497f713cfcbbe548c63743cc17bd792316505
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 10192 bytes