Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da31ddd0718212…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 19:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba9172aae7fdd89a39f0ab69d862fc8 SHA-1: 9f9931c071d2a5d9098b726d6f5c257af2df6180 SHA-256: 86da31ddd07182121e77c52c97f5f87cf13695531869f4cf84b40a2c7a0cdd91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=clear+acrylic+perspex+sheet+perth', suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.com/pify?keyword=clear+acrylic+perspex+sheet+perth
    • http://files.fasttrack.cognitiveguidance.us/uploads/1/3/2/6/132681634/6eed9cde5ab7a.pdf
    • http://files.puttdoctor.com/uploads/1/3/0/8/130873996/xuwokunapuzatij.pdf
    • http://wenidunus.haikutokyo.com/uploads/1/3/2/6/132682076/pupikemaboja_rawasulofifoj_fizesudizu_munawazamin.pdf
    • http://kapij.cardiganbayregatta.co.uk/uploads/1/3/1/4/131438096/cdc3b3557212d66.pdf
    • http://jipivap.ryansbill.com/uploads/1/3/1/0/131070313/doloxuguxujapo_lupimamejusera_jajubumeg_maxegipijofov.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6799/files/soditavumekuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/dezogirajononikijoledot.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/minecraft_has_run_out_of_memory.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/19124130238.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/wipewuzeluvelufedikimexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/rubufiniluvenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/64539665063.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/59401981376.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/47464733285.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_off000061fd.bin
63f1b40a3293ca458229bee2bc726965366c6de0a93863abfefcb8d6b4b0806d
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5096 bytes
font_01_sfnt_off00007357.bin
f09eae940a1be6cfd49882065fd1d94969d0da72b7314be8e53bef6ad47f0279
pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 10560 bytes