Malicious PDF — malware analysis report

Static analysis result for SHA-256 f187360bacd5a2b5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 05:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a643b3cc8f9c050ce1737d59ce564c9d SHA-1: cb25714d2921ae7f0acf9e99cbaeaa8b99b4ae55 SHA-256: f187360bacd5a2b50cff00ed913dbe450c83d523cc00aba0953a6b55b218b8dd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to a 'guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple Shopify links, some confirmed benign and others unknown, indicates a tactic to blend malicious content with seemingly legitimate resources. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=efficient+barrows+gloves+guide+osrs
    • http://zevopeje.befitnow.co.uk/uploads/1/3/1/6/131636947/ragarepex.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/stay_strong_demi_lovato.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9845/files/11184079853.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/68511016113.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/49937268530.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/guided_access_apple_configurator.pdf
    • https://cdn.shopify.com/s/files/1/0461/3911/3625/files/gebel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/vokixukovebasoriwor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/66573143994.pdf
    • https://cdn.shopify.com/s/files/1/0432/5415/3371/files/lurirakerub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/towasegabire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/samijili.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/vokapodepapofax.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/research_problem_statement.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_off000062bc.bin
0bc53c8d1b3c7e308db27d075a1177666a90ab823e11f1d7399874757c50cff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 5436 bytes
font_01_sfnt_off00007557.bin
38a2b9618b10936355455e57fb7e18880ef4539e77c38bbb988f7fd8fbdb8660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 14876 bytes

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