Malicious PDF — malware analysis report

Static analysis result for SHA-256 187a5c8908483087…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 00:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e18d183983b687bc997d6f076c975f0 SHA-1: 52f42858a1b4f4b2b0989c017d1742e3b46a427a SHA-256: 187a5c8908483087d2a9ba59e08f219b72dc3a7e166838923bab89795ecc2e40
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=action+essentials+2+free++full+version'. The document body and embedded links suggest a lure to download potentially unwanted or malicious software. The presence of embedded URLs and the ML classifier's high confidence score indicate 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.cc/pify?keyword=action+essentials+2+free++full+version
    • http://files.mrsherrow.com/uploads/1/3/1/4/131437878/majolowasibem-tudakavep.pdf
    • http://files.oceanstatewine.com/uploads/1/3/2/7/132740541/54d96bad6901.pdf
    • http://jejulukix.readyforkevi.com/uploads/1/3/0/8/130813784/b96307ecf14b05.pdf
    • http://files.ethnoarts.com/uploads/1/3/1/0/131069887/950b7f31dc764.pdf
    • http://tugisu.devinmgill.com/uploads/1/3/1/4/131406893/wuwuzogabux_kixinafipidura.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/green_revolution_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/british_gas_warm_home_discount_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/80590497619.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/fabixezolefama.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/68318694784.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/vimexusalox.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/adobe_after_effects_cc_2020_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0437/1592/0024/files/56779511247.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/xokakozijovegedupigiwob.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/git_deploy_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/94332548044.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_off000055b3.bin
e0bf3a12e634fedc97671fa485dbcf3d79f7d0c8c0a08e64980d9bade9d953cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B3 5056 bytes
font_01_sfnt_off000066f3.bin
9a5441bf842bf45b5874dfe628fbfdc8699b6816a7e2d653ec10a7fb54a379df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 10360 bytes

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