Malicious PDF — malware analysis report

Static analysis result for SHA-256 747e0b84a3f3e218…

MALICIOUS

PDF

37.4 KB Created: 2020-08-24 16:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b1b514c7ad430321f9a0aabcb387e9 SHA-1: efed059f5b29385dd93cb93bdf21ff8e5a29e8a5 SHA-256: 747e0b84a3f3e218868de7036bf81585d1e1b4eef93f016bd909a1ec85a9f22e
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware. The document body and heuristics indicate a lure for a 'steam_api64.dll free for gta 5' download, suggesting the intent is to trick users into downloading a malicious file. The presence of numerous external links, many pointing to Shopify, further supports a link farm or SEO poisoning attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=steam_api64.+dll+free++for+gta+5
    • http://files.mightydisplay.com/uploads/1/3/0/8/130874400/ad1c17132081.pdf
    • http://files.tnnme.com/uploads/1/3/0/7/130739093/4139237.pdf
    • http://gosotu.brooklandplace.com/uploads/1/3/2/6/132696111/zudewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/calibration_of_temperature_transmitter.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/31483341423.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/neurological_examination_osce.pdf
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/daginebodinegufil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/chest_guidelines_anticoagulation_valve_replacement.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/dementia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/bambi_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/43846105183.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/50846590215.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/ali_baba_and_the_forty_thieves_summary.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/jozedojilumenet.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_off00005276.bin
af061beb7d4ac377e9871bcce1774bcfb0ee4131ca8c7b3161c365ad8221aec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5276 5712 bytes
font_01_sfnt_off000065ee.bin
0c4e2f4b72c12b1c3e98115f3e3878eb1b20c908f24490befa0e6ae80e150cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 10148 bytes

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