Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbf915b76bdc0d2…

MALICIOUS

PDF

46.5 KB Created: 2020-08-04 17:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0aada155c25a7bc4df9de81b321e1d5 SHA-1: 7f300a4ba768d442607e51f3edbb3ecef7edffc9 SHA-256: abbf915b76bdc0d23a02326de8ed22b0731fd82e97aa1d624981d591f07bc1a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=apostasia+en+la+iglesia+cristiana+pdf, which is a primary indicator of this malicious redirection scheme. The presence of numerous other PDF links further supports the link farm 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=apostasia+en+la+iglesia+cristiana+pdf
    • http://tizaja.alatorreartwork.com/uploads/1/3/1/4/131437792/fdcc2d.pdf
    • http://files.joshtrentadue.com/uploads/1/3/1/6/131606666/mugobekigorer.pdf
    • http://files.chaxomusic.com/uploads/1/3/1/4/131408056/6373607.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/31620005690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/61145783892.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/36691291548.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/jalobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/zuzefekigiritaxuke.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/rakanuputupid.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/vapogas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/d_d_4e_eberron_campaign_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/1605705358.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/minecraft_one_person_sleep_command.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_off000072c4.bin
54585b3193722097a3bc39859edc3a80125a7b634d869d70d05331f28e7f5872
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 5312 bytes
font_01_sfnt_off000084e7.bin
c59aa873c484a6d8e5f0620cd8e8bdf77335455b504223d359833aaedcac8f46
pdf-font-stream PDF embedded font (sfnt) at offset 0x84E7 12092 bytes