Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca9816af02a74c4…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 05:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc45fd3415e55119e60a54c5479adb9f SHA-1: 6058d129bd834fd43a1e7b07c64c633518dee1c5 SHA-256: bca9816af02a74c44fc303fe61c124ed847b0e2b130b7845f304e5644b5fd9c5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, a technique known as a link farm. One of these links, https://ttraff.com/wix?keyword=shikoku+japan+88+route+guide+pdf, is flagged as a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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/wix?keyword=shikoku+japan+88+route+guide+pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/mokemawodifedawejusod.pdf
    • https://cdn.shopify.com/s/files/1/0433/4066/0895/files/area_and_perimeter_of_trapezoid_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2672/files/58980631404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/british_thoracic_society_bts_guidelines_asthma.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/lovogunusaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/workplace_health_and_safety_act_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/gizijoditagowu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/guwivupaduwosed.pdf
    • https://static.usrfiles.com/ugd/e33828_46b472f25b194cffa8822cbc488c1783.pdf
    • https://static.usrfiles.com/ugd/b8c837_857fd19f984e4c0fa702c7e3211b0246.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f625cbcf4794ec5883a050d4165a7bc.pdf
    • https://static.usrfiles.com/ugd/6290de_c2d1a5d705724d30a4da8b6ca58a7b7c.pdf
    • https://static.usrfiles.com/ugd/e3ff21_39e6685b67824db7847a715c49fee29d.pdf
    • https://static.usrfiles.com/ugd/de02f3_7da2d0ff80114a2aa8d79c55ec667190.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_off000062c9.bin
44ec010b014f1eeff85dbcc3363343a8ac0fe3ecf5997b8587f92fa2849d8e71
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5532 bytes
font_01_sfnt_off0000758e.bin
dc4ab06c703c508a7b06dda700d8bd8c1c0c7c0bebb0638ec2589f788ec625cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 14744 bytes