Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dbfc860256560c…

MALICIOUS

PDF

61.6 KB Created: 2020-08-29 23:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ec898a106893be27bb66497bee8910 SHA-1: b85cb30a52126a1a63ad85adcf80992183e81d16 SHA-256: 38dbfc860256560cc171768a565a2e14a327681fea10157fc2aa08bdd5b2ae19
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=mystery+case+files+ravenhearst+unloc
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/mobobobozufomepadelikab.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/9932652801.pdf
    • https://cdn.shopify.com/s/files/1/0440/2793/6918/files/watchmen_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5788/files/46819310733.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/avengers_3_java_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/vavamevujojojebukotelojer.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/sutibuzekuzelitok.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/pdf_split_and_merge_software_free_download_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/zerapozodaluxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/handicap_placard_pa.pdf
    • https://cdn.shopify.com/s/files/1/0444/4022/3911/files/11743849196.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/162131612.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/buwerazurapidulabeke.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5aa.bin
f7114f5aa054efb05ba9aeaaf642814c60c81829bcdd392be774c74900caa9bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AA 5020 bytes
font_01_sfnt_off0000b6bf.bin
cf84aae0a65995e2fe083840b1903b360cc990705c0f42239e11a754eb391730
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BF 10760 bytes
font_02_sfnt_off0000db6e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6E 4324 bytes