Malicious PDF — malware analysis report

Static analysis result for SHA-256 c611356304b04640…

MALICIOUS

PDF

45.8 KB Created: 2020-08-18 21:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91569367de7357b8907b964c2804e126 SHA-1: 69ed196ff318c22bba3a154068fc68452d752ada SHA-256: c611356304b04640c485a0b7ce65e379cfc8d8b867a7f97de1b517153d76fa2f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though partially corrupted, also contains this URL and a reference to 'Top 10 android apps for productivity', suggesting a lure. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO-based distribution effort. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=top+10+android+apps+for+productivity
    • http://files.dvrealworldlearning.com/uploads/1/3/0/7/130776033/vebozotugazuzimofed.pdf
    • http://niwotape.commonmissionwomen.com/uploads/1/3/0/7/130739656/wasaxoxopusadaguk.pdf
    • https://cdn.shopify.com/s/files/1/0449/7191/7471/files/asean_regional_forum.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/algebra_2_practice_and_problem_solving_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/vevewesimaroboretavujegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/50558461157.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/anaphylaxis_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/botatenudunavimaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/91467228777.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/xigupukavunux.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/5125613826.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/31349067969.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_off000073ee.bin
ea599444f85b5757f17ebe819cf67486d7246f38bf2c4644a07350f91806bfd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5420 bytes
font_01_sfnt_off00008670.bin
4c6996af088472744c894657365d67be8d061bcd5e7a8c56039404992d409122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 10532 bytes

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