Malicious PDF — malware analysis report

Static analysis result for SHA-256 224a1e7939e63d98…

MALICIOUS

PDF

47.1 KB Created: 2020-08-19 00:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9999797837089f7b991f14a47660fac SHA-1: 6041285bc45c577b7c0fc7bf39dbb108b8eb879e SHA-256: 224a1e7939e63d98fcdec560672c318342bb53fb929c460cde97ae222014c55d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic indicates the presence of a PDF link farm, with a primary URL pointing to a redirector service. This suggests the document's purpose is to lure users to malicious sites through a chain of redirects, likely for phishing or malware distribution.

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.cc/pify?keyword=mv+boomerang+wanna+one+wapka
    • http://files.firestartershrines.com/uploads/1/3/0/7/130775245/vagaxidevavigebuwaga.pdf
    • http://pinixew.theprideofsouthside.com/uploads/1/3/1/0/131070604/2c228bb1642.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/76227212180.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/pdf_to_word_convert_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/kashi_amarnath_bhojpuri_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/55243520616.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/cardiac_cycle_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/duduw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/nukebatidakiwelutuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/50099262073.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/48619028578.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/pixilopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/tobulipinepokot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/vasejebagetofolebi.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_off000064c9.bin
14604a4d528bc11b1e90c2bc408084a5c1db7364073fb6094d3e112f22c839b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 6652 bytes
font_01_sfnt_off00007afe.bin
918bcdd166ae7667d31d53501734e661ebf4b22f679bbfb73026b0e1b131ad27
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFE 5288 bytes
font_02_sfnt_off00008d08.bin
113c17f2df733e2be33db426967ddef2e15662c4b468ad5bb54addd88df988e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D08 10024 bytes