Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa33762e14a23535…

MALICIOUS

PDF

40.0 KB Created: 2020-08-17 06:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5facdd6fbcc9b86f889e899d47d6a92 SHA-1: fda1650652130c78e35dfe90f7a2c2f700bbaae0 SHA-256: fa33762e14a23535d0c27f958cfdc0f69c4299b8d4a026a0e5a2f584c4fd9921
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a user guide. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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=al+harameen+watch+user+guide
    • http://zalogilo.gcofc.org.au/uploads/1/3/1/3/131380213/9490024.pdf
    • http://files.shopmaryannsdanceandmore.com/uploads/1/3/0/9/130969545/wadawofuxeb-dobigef-netoruxekag-lawawizo.pdf
    • http://ravup.highgradeglobal.com/uploads/1/3/0/8/130874493/nonixivep.pdf
    • http://files.cfstephenville.com/uploads/1/3/1/4/131452735/6419553c1ea.pdf
    • http://files.prostatecure.org/uploads/1/3/0/8/130874252/rimimamenijo_giziju_venuluk_jadonati.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/22158810425.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/fire_emblem_three_houses_edelgard_support_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6436/8021/files/81252476648.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/radioactive_aerosols.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/tinazujojanu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/duzurewof.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/vesusaluwanufodulube.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/begakuriri.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/24497954767.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ethnocentrism_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9321/3852/files/danuwazoxiximibamob.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/tofipow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/breath_of_the_wild_enemies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005009.bin
df4ff918498c0cc0e6f1758e44353040411bcbc1f7d2df8e9b61f526d1321507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5009 5208 bytes
font_01_sfnt_off00006196.bin
bc1ea032257b9d464b03831db431b8fd075eb83ae2517faf0b944cf2708a7256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 10268 bytes
font_02_sfnt_off000084a0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 4324 bytes

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