Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee11cc573fba529…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 14:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecf3c77edd79840696a162459ddf3ec4 SHA-1: 57c0cd797fc909b7a01148475ae2dd45afe084cf SHA-256: dee11cc573fba529ab50c14f828d1747a0d702fb40e33fee8f698b22a4362449
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pvc+card+printing+software'. This URL is likely part of a phishing or scam campaign, attempting to lure users with the promise of 'pvc card printing software'. The document also contains a mass external PDF link farm, with many links hosted on shopify.com, some of which are confirmed benign, but others are unknown or potentially malicious. The ML classifier strongly flagged this PDF as malicious.

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=pvc+card+printing+software
    • http://savejop.cameratakilkenny.com/uploads/1/3/0/7/130739654/resizetiku-paton.pdf
    • http://files.froggyplaces.net/uploads/1/3/1/8/131857758/wazubipagatu.pdf
    • http://tukigakid.mariaeburns.com/uploads/1/3/2/8/132814930/7267939.pdf
    • http://files.thunderbirdobgyn.com/uploads/1/3/0/7/130776592/8649284.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/up_apartment_ownership_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/87892448251.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/6898948300.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/arduino_mega_pin_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/candida_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0431/7305/2575/files/l_anaphore_et_la_cataphore.pdf
    • https://cdn.shopify.com/s/files/1/0434/3562/2552/files/wemojizoxefen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/toefl_speaking_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/xoxamasiwoxajovozudil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/vat_calculator_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/95773397894.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_off00006b55.bin
6f6cea328e2290a5b63c70f27be469dacd17f2c2d861e69b6a94d8bb3ac8bf16
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 5444 bytes
font_01_sfnt_off00007e00.bin
e26101f4d65efc22b0d03fd5cbacf5d15bb74523e56ec2dd8266d91167835532
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E00 10112 bytes