Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b4b63bd7168981…

MALICIOUS

PDF

57.9 KB Created: 2020-08-30 04:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27cd23f897ef4fded9b4950b4eca4b67 SHA-1: 5183ee367002c98d8c3f828845ed26ea5571105c SHA-256: d1b4b63bd7168981e543dfe34ca017ea7ee59dee26a076ff1565146d1234e004
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on cdn.shopify.com. One of these links, however, redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. No scripts were extracted, and the document body was heavily obfuscated.

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/wix?keyword=management+information+systems+managing+the+digital+firm+15th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/adobe_indesign_cs6_full_crack_sinhvienit.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/63119791082.pdf
    • https://cdn.shopify.com/s/files/1/0452/1289/3344/files/texas_dental_jurisprudence_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/sasoxegani.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/23494603643.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0276/files/specification_for_structural_steel_buildings.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/bangladesh_bank_job_question.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4018/files/comatose_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/44868689897.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/fuvoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/zizarezosikafuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/76472297223.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_off00009337.bin
fa6abe3c89a18efbb373d8a19f610e293d319cc91a92a4fd928036363bad3c6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9337 5524 bytes
font_01_sfnt_off0000a5e7.bin
ac816487f84364272d1be2bf1a40070c5d0288bbca8b155b9b168bd886b215bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E7 11560 bytes
font_02_sfnt_off0000cbfb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 4324 bytes