Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0a71ba05878f2b…

MALICIOUS

PDF

52.9 KB Created: 2020-08-20 02:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b362f456bd0ee1600c09b3275eff03e SHA-1: 64a7e623354784c24751d208a66cf658d1eb4161 SHA-256: 0f0a71ba05878f2b2a09aa5448ec59db385d9e43643ce0e1280be553e492951b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though obfuscated, contains text that appears to be a lure related to car performance. The presence of numerous external PDF links, many pointing to potentially malicious or unknown domains, further supports a malicious intent, likely for phishing or distributing further malware.

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=bmw+x2+m35i+performance
    • http://files.nsconfiance.com/uploads/1/3/0/9/130969993/gomukidi_momorakodi_razefi_magatadabij.pdf
    • http://files.balancedpets.ca/uploads/1/3/2/6/132682745/5990b46e.pdf
    • http://mubimixag.ketymae.com/uploads/1/3/1/4/131453027/538b5.pdf
    • http://files.logoffvacation.com/uploads/1/3/1/4/131438570/71f81c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/73188089766.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/literature_review_on_bidirectional_visitor_counter.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/garebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/dazavogabazaresaxavowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/lista_vencida_axn_cover.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/xadowozizabinuteminorumad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/56974441469.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/jukipaxigudo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bd0.bin
6713171b73dcf7eb606c527f5c75cab75c9931451f159204bedd890392f29109
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD0 5580 bytes
font_01_sfnt_off00008ec0.bin
f3de230effd4a4a3ca3d1df1dbe69d3228abdc5ab9a02e363292342ac6e122e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC0 10376 bytes
font_02_sfnt_off0000b282.bin
322960140e8024396b5b1c4c028d7a62aefee8ec5a9420328982b465283c0a07
pdf-font-stream PDF embedded font (sfnt) at offset 0xB282 16036 bytes