Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d9021d566953a5…

MALICIOUS

PDF

35.8 KB Created: 2020-08-17 05:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75dc4405516484bbe05beae90f312e2 SHA-1: 9befff42fc74683a6f64164fbe45482b67405bfe SHA-256: 02d9021d566953a5f101ca3091185c38cfe30b1a7a4bd6d148129d079f84b285
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and a plausible lure related to traffic reports. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a malicious site or download further payloads.

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.ru/pify?keyword=traffic+reports+bridgwater+somerset
    • http://files.dougsheat.com/uploads/1/3/1/4/131406592/mexivubelab.pdf
    • http://malonofi.charlesstickler.com/uploads/1/3/0/9/130969191/3519099.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/evs_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/19971081221.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/janolosuzinumuwagoguvemes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/tagibobavov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/fusatovowavavojiladufif.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/dusixotegazuwatujama.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/jorufexuvefemulobugaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/titan_quest_harbinger_build.pdf
    • https://cdn.shopify.com/s/files/1/0434/3336/1574/files/overlord_light_novel_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/widigazojoketavotanim.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_off00004aec.bin
c34a96e347af038155287b9b5e3e824860b07eb5b134c2755eab1023412f6b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEC 5624 bytes
font_01_sfnt_off00005df8.bin
6502099066ec0202a319beb1c82915b32b429bdefe07fa6bce9268effdf33567
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF8 10180 bytes