Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6406e1a5225de9…

MALICIOUS

PDF

49.5 KB Created: 2020-08-20 18:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0486a26cde023496979fc3cfff0c3e8b SHA-1: eccddb0e2032e7566a673a1da6e40e9b73cbe4a1 SHA-256: 5a6406e1a5225de9801808664f765b0acdcf6560994cdf7365191a3ba48fbd1d
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 redirector infrastructure or link farms. The primary malicious URL identified is https://ttraff.ru/pify?keyword=vanilla+wow+darnassus+reputation+guide, which is flagged as a known malicious redirector. The document body, though obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites under the guise of a guide.

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.ru/pify?keyword=vanilla+wow+darnassus+reputation+guide
    • http://files.lasierrasoccer.org/uploads/1/3/2/6/132682040/vegujel.pdf
    • http://files.marionnaz.net/uploads/1/3/1/6/131637553/pusikegigowele_wunusikimiw_lupupituxone.pdf
    • http://files.hollygunn.com/uploads/1/3/1/4/131453695/jivifemivukur-zanuni.pdf
    • http://fodeti.nigelgorskiconsulting.co.uk/uploads/1/3/0/7/130775565/7805eb6002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/39328656389.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/87921020215.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/wivawekazijuzaxifesaral.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/sukonubajilewulileroz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8682/9981/files/action_linking_and_helping_verbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/9549790391.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/g_d_a_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/tojuzobupazifenexaviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/bozakovibimixo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/full_sbs_3d_movies_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/texas_trailer_bill_of_sale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b32.bin
bd40f18fd383174752477909db451fcb4c37d219eb7a1b95e2eba6e2cec49b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B32 5064 bytes
font_01_sfnt_off00007c86.bin
823ab0276a6db16a7f81926b0ea9b5a130fad2c248dd3d24a37fde83eb6eda1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C86 15048 bytes
font_02_sfnt_off0000ab04.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB04 4324 bytes

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