Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6bfa4600cdca16…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 19:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9edcf41e538ccaeda9368f95353222 SHA-1: c1806f4d4b34c9813d1a59d7e53acbd6880aa153 SHA-256: de6bfa4600cdca16aae149d3dd2cb60da950514c90b19ed19d274967e0590042
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one to a known malicious redirector (ttraff.cc) and a link farm hosted on Shopify. The document body, though heavily obfuscated, appears to contain text related to a compressor manual, serving as a lure. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector and a link farm supports a social engineering attack pattern.

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=bauer+poseidon+compressor+pe100+manual
    • http://fonitaju.hudsonteachersassociation.com/uploads/1/3/1/4/131407406/pizovive_nokixasumo_karezofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/79575023414.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/8173637139.pdf
    • https://cdn.shopify.com/s/files/1/0447/9965/6087/files/broteinheiten_liste.pdf
    • https://cdn.shopify.com/s/files/1/0437/3636/7265/files/dudagutub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/hssc_declaration_form_annexure_e1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/bonevedakafepiremapatifew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peregomosurexezobosezob.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/47311017986.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/wirabuxemebovopazavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/serotugojipuxatufakanam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.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_off00004ae9.bin
b8d8e1cbd24a6dd003c25878486183da65164603180ceb149eb3045420866d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE9 5264 bytes
font_01_sfnt_off00005ca4.bin
78df07723400d4c0f2ff7ff2c03f60910697ea0551fc6e7ff9e787a25a4054c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 14564 bytes
font_02_sfnt_off0000892c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 4324 bytes