Malicious PDF — malware analysis report

Static analysis result for SHA-256 0327db8503fc87dd…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 12:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd4c490dbd998c42acb02f67118b12b4 SHA-1: 33987bf7a0b196596d5cc19fe23d4a1f05dd5f5e SHA-256: 0327db8503fc87dd10ec0d51b047773967dc9d5cba6963d14f80b2c5373664cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a phishing or scam attempt where the user is intended to click through to malicious infrastructure. The presence of a malicious redirector URL and the sheer volume of links indicate a coordinated effort to distribute malicious content.

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/wix?keyword=mr+coffee+kg2+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/loan_budget_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/devonunomuxedukafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/girulakejufisuzomil.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/91516183026.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/24928029488.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5397/files/74923443193.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/36497965068.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/5_campos_semanticos_de_frutas.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/gitide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/11982930406.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/cbse_class_5_maths_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/82541830995.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/82599624461.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/rikenulivoxefipifimumak.pdf
    • https://cdn.shopify.com/s/files/1/0437/1801/7175/files/amrit_maan_difference_song_video.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_off000067f3.bin
f5b6da299597c9d36dc96c4d6ce45d8913963d57054529bc95a11ebb1530491e
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F3 4984 bytes
font_01_sfnt_off0000792a.bin
25e1e4bee73165bb4d044ebb236d8d672e427633067686024a7b88863d6d6b3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 10748 bytes