Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a195a8299cf968…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 03:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc611596e2b93a3b07eb226fc605b94e SHA-1: ecbd4ae85007c08963953ad123059c130db91042 SHA-256: 42a195a8299cf9689ce5ff92c750cf181be79daf19cf598d60554e3852f01970
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'petty cash reimbursement form template' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely for SEO manipulation or to host further malicious content. The primary attack vector appears to be social engineering via a deceptive document, leading the user to a 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=petty+cash+reimbursement+form+template
    • http://files.sunfoxfarm.org/uploads/1/3/0/8/130813612/dokage_junakuxapew_varovakawujisu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/21905577019.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/28568233178.pdf
    • https://cdn.shopify.com/s/files/1/0438/0485/2381/files/best_video_editor_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/96982003897.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/44492360419.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/49610631855.pdf
    • https://cdn.shopify.com/s/files/1/0464/3264/9368/files/babylon_hd_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2136/files/fedese.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/62603003545.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/fobibewezumolanebolab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae0.bin
0a1732ad025f953805a96f9caba5850e84593a79e5a20ea98dadeb2c94b21dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5380 bytes
font_01_sfnt_off00006cff.bin
531752c32ee150f176a604076088b77a215a0f9bc96100540dff94857e2f6a57
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 9932 bytes
font_02_sfnt_off00008f03.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F03 4324 bytes