Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be11f6319691aa0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-24 22:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f53519a94a26696aa267464109869aaf SHA-1: 6834358d3a7d075ec0bdea3263bf3e9fd0f98b3a SHA-256: 7be11f6319691aa079b99b06cef83167a19434ab265da24f3b304ad51b30d93a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the URL and a title that appears to be a lure. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=american+billboard+awards+2019+performances
    • http://jamaj.theopenbus.com/uploads/1/3/2/6/132683138/vamusedejagi.pdf
    • http://jizekad.wikiscreenplaycontest.com/uploads/1/3/1/4/131438216/wojinotizalej_fuliraz_pedurimubitux_tugujoleto.pdf
    • http://files.whitneylawrence.com/uploads/1/3/0/8/130814586/bc71d2a6944df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/xeretapenobobope.pdf
    • https://cdn.shopify.com/s/files/1/0435/8121/0787/files/27634190108.pdf
    • https://cdn.shopify.com/s/files/1/0437/5753/5390/files/64880177611.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/83875833809.pdf
    • https://cdn.shopify.com/s/files/1/0436/4707/4464/files/thermodynamics_cengel_7th.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/kaleido_star_sub_indo_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/edit_text_file_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kusamusa.pdf
    • https://cdn.shopify.com/s/files/1/0462/6513/9354/files/aquage_transforming_paste_4._6.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_off00006786.bin
9b36debd320d5e18ac7a560e97f8b5b1ca289b83a1691fc00a61eaac6706c011
pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 6004 bytes
font_01_sfnt_off00007be0.bin
79bfc3a02830aad41a5c899632f75df20c9ea98452a8617c77961d954e68bd00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE0 10248 bytes