Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a10fdfab6c7d26…

MALICIOUS

PDF

46.0 KB Created: 2020-08-07 03:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b73acd1220f41497b0c07b852c1229 SHA-1: 5208f9d30a1356c44f4541cee9dfbb807eb65ab9 SHA-256: 82a10fdfab6c7d26f51beead1de5f90fb0c5ad678484f793589051706dbd73c5
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are algorithmically generated and point to SEO-optimized PDF documents. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body also contains obfuscated text and a URL that appears to be part of this link farm. This suggests a campaign to drive traffic to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=printable+blank+map+of+asia+pdf
    • http://files.rvmulch.com/uploads/1/3/1/0/131070971/9850552.pdf
    • http://files.annemcmillslighting.com/uploads/1/3/1/3/131379054/9741375.pdf
    • http://files.harrisvillegolfcourse.com/uploads/1/3/1/4/131483214/6634809.pdf
    • http://files.couplesforchristuk.org/uploads/1/3/1/3/131383737/2388002.pdf
    • http://files.heartofamericaherefordassociation.com/uploads/1/3/0/9/130969204/5885183.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/shannon_diversity_index.pdf
    • https://cdn.shopify.com/s/files/1/0448/1299/2674/files/deeplearningbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/pejiximosologila.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/nipisew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/datawuwabemetixomizodim.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/14392834996.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7112/files/duwerekorexuzedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/99511918990.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/4590417348.pdf
    • https://cdn.shopify.com/s/files/1/0439/6105/7438/files/gepalem.pdf
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/jimegonesibotigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/kofejoniwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/mesofefeb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689c.bin
0066f702cb47e2c5dfb960f606073411966cb199c60bb12bb7b49e7af8c3e32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 5180 bytes
font_01_sfnt_off00007a0c.bin
5bf63bd867b7fff34e4a48d5eb30429c0da96682a8ecefc760d933f9c7c2fce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0C 10032 bytes
font_02_sfnt_off00009c62.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C62 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.