Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01b2f5c652ce549…

MALICIOUS

PDF

52.6 KB Created: 2020-08-08 12:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7ade413ed49336dfbd506ac6855492 SHA-1: 7e7e18172b1b1eb205f33454ddd495dbc6e0fa04 SHA-256: e01b2f5c652ce5497cab526281b7d6bf384385f786784a78ffa060451ca84932
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites. No scripts were extracted from this sample.

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=dokumen+amdal+rumah+sakit+pdf
    • http://files.deadliftcoffee.com/uploads/1/3/2/8/132814302/6679080.pdf
    • http://files.clearhrsolutionsd.com/uploads/1/3/1/3/131398250/rifet-zabaza-saretemufiwigo-gexegukux.pdf
    • http://wirezi.siobhanmknox.com/uploads/1/3/2/7/132740214/14185.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/80538661671.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/mewamilobuzabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/vikixufopige.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/what_is_cheatbreaker.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/astronomy_now_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/42796664490.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0431/9313/9357/files/trumpet_christmas_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/xutivomixepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/the_choice_for_love_barbara_de_angelis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/pain_three_days_grace_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.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_off0000916c.bin
60118bf8f9cb2010fc365d16c86ee9c9249ef17e69c1c9646eb384274e9c0015
pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 5344 bytes
font_01_sfnt_off0000a376.bin
ae4cdf8fcb82a3c070838605b0d09de56ccbfbca47ac8f81d52fabe8257ffb82
pdf-font-stream PDF embedded font (sfnt) at offset 0xA376 9932 bytes