Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e159ddd30b33e7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 03:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f82c0c8fa1adcf21f6d314ec1ea11c61 SHA-1: 7c5252174d530335d1491d2818d823a9ac3d4bd7 SHA-256: a5e159ddd30b33e7545b62be68e310c8d42abd3aa78635a0c476d9adc19f81a8
180 Risk Score

Malware Insights

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

The PDF contains a mass of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Rhel 6 desktop iso' and explicitly requests sensitive recovery information, aligning with the 'SE_SECRET_RECOVERY_LURE' heuristic. This suggests the primary goal is to trick the user into clicking the malicious link, likely to download further malware or phish for credentials.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=rhel+6+desktop++iso
    • http://vuxasu.nyschsaacheerleading.org/uploads/1/3/0/7/130739048/6ad2d589e7.pdf
    • http://files.catharinegellings.com/uploads/1/3/1/1/131163635/degodopevoveb_kiluwagezisogar.pdf
    • http://files.bowleylockcompany.com/uploads/1/3/1/4/131454521/c5a57aa4a.pdf
    • http://files.ezservicelist.com/uploads/1/3/2/3/132303229/fa19a045.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/xawowurogimuwudejowogala.pdf
    • https://cdn.shopify.com/s/files/1/0448/8983/3639/files/80337368092.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/breast_cancer_causes_symptoms_and_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/chase_credit_card_authorized_user_information.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/21055011803.pdf
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/backflip_practice_video.pdf
    • https://cdn.shopify.com/s/files/1/0461/8148/2650/files/luguz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/zukulimevubiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/51351536863.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_off00005cf0.bin
1b0d5ffa37bae9a033927668dab6546311bac484b5860d4222183dde647042e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF0 4964 bytes
font_01_sfnt_off00006dd3.bin
d49c6082e3c358d8010756e0070ce134067a7b0c024fa09929ded80976fc1b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 13696 bytes

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