Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7b0604481ad6b2…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 23:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6efa0a643676b98a31a23e71d94fb63c SHA-1: fedf7e78842cc756d1cee46daf4b7bb50ed72c95 SHA-256: 5a7b0604481ad6b259c93d26b2d75a75b4f6ddc93bccb722a92fae1e3b39d2f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a video game season pass, likely intended to trick users into clicking the malicious links. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent.

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=borderlands+3+season+pass+ps4+not+ing
    • http://files.amandaowensonart.com/uploads/1/3/2/3/132303068/paxoj.pdf
    • http://files.centermentalhealth.com/uploads/1/3/1/1/131163920/podejefudededidobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/fajopiduv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/awaken_the_giant_within_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0463/6521/2827/files/82145291022.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/96590976540.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/mijovofazexiw.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/belkin_wireless_g_usb_network_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/70502396762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/73955448585.pdf
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/jepozowotoliwexegamur.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/96797260799.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/roboval.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/31730619140.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_off00005ea4.bin
2b98fba34171c8ceb78fa5dedfd8b995302a0275ba7d02888a9dd02164b42b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 5428 bytes
font_01_sfnt_off0000712a.bin
a937c37ba9361e4062dec9b909554172012bb8551f11d283234618a51ae9c35a
pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 10128 bytes