Malicious PDF — malware analysis report

Static analysis result for SHA-256 b242db86df0a63fa…

MALICIOUS

PDF

54.2 KB Created: 2020-08-18 17:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2464e1888056911907b350ff4e3a9600 SHA-1: 0def7e9f34cb93425347d90a17ff4b692cdd48cc SHA-256: b242db86df0a63fa0e3110cc1511cedd21266128900bc38cc30c2d725a9a7151
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'minecraft cracked 1.12.2'. The document body and embedded links point to numerous PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to drive traffic to the malicious redirector. The ML classifier strongly indicated maliciousness.

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=minecraft+cracked+1.+12+2
    • http://files.manticarchitecture.com/uploads/1/3/1/4/131406659/2712356.pdf
    • http://suvuvo.nhrealestate.org/uploads/1/3/0/7/130739297/5590948.pdf
    • http://files.greatalaskaschools.com/uploads/1/3/2/3/132302928/vipoluvovavov-pukijumujimego-zonaxizinetip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/37745248854.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/88340186469.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/latafilulitudexugati.pdf
    • https://cdn.shopify.com/s/files/1/0447/5099/5605/files/38148023840.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/dictionary_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/jaxajodefixizusege.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/lullaby_of_birdland_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/28610965148.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/auto_transformer_starter_control_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/kundalini_yoga_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/57883899100.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/couple_shayari_pic.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_off000095d5.bin
f4feb8b6ff918ee908c214a3188ffbce3d92fe5ee2f8b1e22cf9b3afa1877749
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D5 5088 bytes
font_01_sfnt_off0000a742.bin
3604dae2ef068621fbf90235c24867e3ea1172fc9c96dce9d76e34576209f73b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA742 10668 bytes