Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8673e19e0e5a2c…

MALICIOUS

PDF

56.2 KB Created: 2020-08-14 13:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07fb4ea5cd937bdf3ef954edde6b6414 SHA-1: b1c276e9dc583d8d55636938374b4d9d8226b8c2 SHA-256: 0b8673e19e0e5a2cca2d3bc9081d9fc6716b8b5b02dfa697e5b160c283845052
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by a machine learning classifier and contains a significant number of external links, many of which are directed through a known malicious redirector. This suggests an attempt to lure users to potentially harmful websites, possibly for phishing or malware distribution. The presence of a link farm further indicates a coordinated effort to distribute links.

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=film+allied%2528+2016%2529
    • http://relepaz.stmaryandstpeterstaines.co.uk/uploads/1/3/2/6/132681352/34e56a1.pdf
    • http://files.pamsteashoppe.com/uploads/1/3/1/3/131384789/59b03f6f49c09c.pdf
    • http://fugesogix.happytailsdogrescue.org/uploads/1/3/1/4/131483337/bijujolidati.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/25761578664.pdf
    • https://cdn.shopify.com/s/files/1/0448/0362/1025/files/anion_gap_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/toraxebujufiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/53456570785.pdf
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/how_to_turn_dirt_into_grass_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/kuvari.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/vosoxalopap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/rajinulodakenomowoger.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/grammar_english_to_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8122/files/29178609054.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/83491627607.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/84098391296.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/torrent_vr_porn.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_off00009e02.bin
21b1b319ca9c3dc3f284ca115f040fe412c90791946bf09ed48b0b766a42cbe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E02 5288 bytes
font_01_sfnt_off0000aff6.bin
1409e2f3cc37dd807197e3bfa7e57bffa07a8ed05f248930cd22a6405ae7f248
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF6 10604 bytes