Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69ada385c7e6ba5…

MALICIOUS

PDF

46.3 KB Created: 2020-08-03 17:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcabda5502586da1a548aedc24514158 SHA-1: 7151a361cff9608f7e758706d5d66daeabfbeb31 SHA-256: b69ada385c7e6ba590bab786cbe11936f624e5ea283b53a5d999edd9ecac9490
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links to external PDF files, characteristic of a link farm. One of these links, 'https://ttraff.com/pify?keyword=adverb+clause+of+result+pdf', points to known malicious redirector infrastructure. The document body contains garbled text but includes the malicious URL and several other Shopify-hosted PDF links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=adverb+clause+of+result+pdf
    • http://files.pacerstalk.net/uploads/1/3/1/4/131452922/jejiz.pdf
    • http://files.frippfriendsofmusic.com/uploads/1/3/1/4/131407406/2108315.pdf
    • http://files.laspinashouses.com/uploads/1/3/1/6/131637190/dodogeti.pdf
    • http://files.fearlesscounselingservices.com/uploads/1/3/2/6/132682327/papinevozaxegix-fizuvijine.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/98901111741.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/rekowe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/fosutavumapexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/selivisiwinedesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/39812701701.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/surah_al_baqarah_english_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/tasuluxejugimedos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/kebabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/panasonic_kx-_tgea20_operating_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.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_off000074ba.bin
3a875f6c25b8ffa7afecc4ac09c5d4c50a34c6712a78d16b022031e73c554a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BA 5340 bytes
font_01_sfnt_off000086f6.bin
51f467be24b9ec35bf9988b59f110eefc9f4c0a3f87c968375ab6588a4ad5512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F6 11048 bytes

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