Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb9a8f718d17316…

MALICIOUS

PDF

38.7 KB Created: 2020-08-22 04:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e408b9af4f7184dbcf783e3849de4b SHA-1: 49f428d494fc3105e56004fcd0aead0c6ba6f674 SHA-256: 5eb9a8f718d17316469448948f1cb9fc94895f011dfa7566aff5533b5f6f9611
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for 'Powerpoint template gratis'. The presence of many Shopify links, some benign and some unknown, suggests a link farm or SEO poisoning attempt to mask the malicious redirector.

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=powerpoint+template+gratis
    • http://files.pleasantpointcommunitychurch.com/uploads/1/3/0/9/130969663/zugisegi_gitakap_tijekima_sesifipilas.pdf
    • http://files.philipleiperarchitect.com/uploads/1/3/1/0/131071166/lokudujozelufajiluno.pdf
    • http://files.whatisabbydoing.com/uploads/1/3/0/9/130969465/3432758.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8111/3506/files/one_missed_call_japanese.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/vujosetalejusorow.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0352/files/27849267121.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/91577386825.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/business_card_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5503/9135/files/82123105981.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/breathe_doterra.pdf
    • https://cdn.shopify.com/s/files/1/0431/6636/7895/files/list_of_nationality.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a02.bin
ea9d59e5a66beb2938b8e2513935bb99e9ba57e87b324c16b34e665dea9d9918
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A02 5232 bytes
font_01_sfnt_off00006bc1.bin
b7492e96c6e840a9d8d248ee82ca15a466352fc91f537733c9dfa7d1a995c781
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC1 10296 bytes