Malicious PDF — malware analysis report

Static analysis result for SHA-256 241bda54501b6b08…

MALICIOUS

PDF

60.1 KB Created: 2020-08-24 13:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30e3c4d00f462483785f5eddb7624e52 SHA-1: 4ab70d533cad1eb3ff8cbd46bb3d5739e2f94e49 SHA-256: 241bda54501b6b08cf3520d74dcacaa47d00576427571096592e7f3537517cf4
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious payloads or phishing pages. The document body text, though heavily obfuscated, contains the anchor text 'Beechcraft bonanza a36 parts manual' and the malicious URL, suggesting a lure to trick users into clicking. The PDF also contains a large number of external links, many pointing to shopify.com, which is indicative of a link farm used for SEO poisoning to attract victims.

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/pify?keyword=beechcraft+bonanza+a36+parts+manual
    • http://files.createweddingsandevents.com/uploads/1/3/1/4/131452950/boleluvafu.pdf
    • http://files.f4f-uncdf.org/uploads/1/3/1/6/131636677/lexejeli_bizutit.pdf
    • http://files.nigellasativacenter.com/uploads/1/3/2/6/132683088/02db50.pdf
    • http://files.eco-tique.com/uploads/1/3/0/8/130813524/6897127.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/simple_messianic_passover_haggadah.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/95642885680.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/smokey_robinson_greatest_hits_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/2363/4330/files/cell_cycle_and_cell_division.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/java_programming_for_beginners_mark_lassoff.pdf
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/exercices_adjectifs_possessifs_debutants.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/suxoxenidopoje.pdf
    • https://cdn.shopify.com/s/files/1/0464/9884/0744/files/49248645074.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/sasalerisugekuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/psychology_practical_book_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/vertex_astrologia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009be3.bin
d40452453f65b1db51b59e510c5b3445b93d12120bd6b0f142ca1f38744e8bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE3 5812 bytes
font_01_sfnt_off0000af80.bin
d99aea51c6c556ab3518e9cfa31112abc3b8258ba060074ccfaf093115e764bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF80 17184 bytes