Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa25a4027a6be7c…

MALICIOUS

PDF

58.1 KB Created: 2020-08-14 00:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bd535bf964d762113fec30fc1f3c79 SHA-1: 8673df5991d704f1c6e2b1611a005cdc9bd2635c SHA-256: baa25a4027a6be7c8eb69834ebdef661f5e3292d8f96d98b3cd43f762b50fec2
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://ttraff.com/pify?keyword=admob+developer+android, which is likely used to redirect users to further malicious content. The presence of numerous links suggests a link farm or a phishing attempt to drive traffic to malicious sites.

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=admob+developer+android
    • http://files.citiesbysara.com/uploads/1/3/0/7/130739444/34b362eb3ce75.pdf
    • http://files.sofafoundation.org/uploads/1/3/1/3/131384127/8503099.pdf
    • http://dupigu.heroinetheplay.com/uploads/1/3/0/9/130969873/rovome_kukimesak.pdf
    • http://files.fashionbysitaramysore.com/uploads/1/3/1/4/131407361/mizoxumixemufiworux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/free_postal_exam_473_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/wetudowufewulinozepiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/55382888925.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/activities_of_daily_living_roper_logan_and_tierney.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/managing_for_results_peter_drucker_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/55230975990.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/84996518388.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/82223793973.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/preschool_phonics_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/sibimunuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/36957006876.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/break_from_toronto_mp3.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
stream_005_off0000ac52.bin
183bf0d6b52e4bcdd951b728a312472f5ff0b769ab4c3a07e7b8a8507281d2a8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC52 26732 bytes
font_00_sfnt_off0000755b.bin
d4574a5f5176b82277832c740b7a78b72b921733d5c08e000ee226c943c131f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 5116 bytes
font_01_sfnt_off000086ac.bin
ba9bcf6d585e6835bc0e578e981fedd6580a86ece13d9804ef095bdce295388d
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 10908 bytes