Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b9226715536228…

MALICIOUS

PDF

42.8 KB Created: 2020-08-15 03:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e235b612e416cbd8fee10093360a525e SHA-1: 1d4461ab9da6d7bf84cf46bcff5b81c50c8f5511 SHA-256: 81b92267155362280ce9cee170da4fd6aab449cddce62d3358186177d205c6e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the sheer volume of links points to a link farm or 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.cc/pify?keyword=akele+h+chale+aao+song
    • http://files.rossdanieldance.com/uploads/1/3/1/8/131856917/1706017.pdf
    • http://files.drakesborough.com/uploads/1/3/1/6/131607404/gisew-jegagizet-rowaduwaguzaw.pdf
    • http://rakobu.awakenteenleadership.net/uploads/1/3/2/6/132682787/9182095.pdf
    • http://files.alexaflanigan.com/uploads/1/3/1/3/131384025/tozogiwal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/breadth_first_search_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/django_generate_secret_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/ketiridijuwugoxewoximader.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/48455353926.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/61160732714.pdf
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/pandoc_html_to_css.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/living_religions_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/algebraic_identities_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/44211795624.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/94684299595.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/biosynthesis_of_carbohydrates_in_plants.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_off00005334.bin
ad1f39f7cc2c9adccfb87138852588c20c1ca083c27194954dc22178c5cc904b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5334 5016 bytes
font_01_sfnt_off0000643a.bin
6946069a2746a6dc763686459df9f790952fc85b1922638230e033d415eab5e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 14248 bytes
font_02_sfnt_off0000913e.bin
00ccd9f904ac868f4ee20f8dd8cca67779b7dc6f9007279c4ea7d003a3d6e4d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x913E 3740 bytes

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