Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a6dcbd8e3efdc1…

MALICIOUS

PDF

50.3 KB Created: 2020-08-05 08:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f3792f2c928bd56433fb6d2a859b1cb SHA-1: 828282634df397bd031a04594afe12f7bed5250e SHA-256: c0a6dcbd8e3efdc10969e9dd23dffe13ecdac17edaf791025422fbcd6cf10861
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=the+ultimate+guide+to+business+process+management+pdf', which is a primary IOC. The presence of numerous other external links suggests a link farm or traffic distribution scheme, likely intended to lead users to malicious content.

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=the+ultimate+guide+to+business+process+management+pdf
    • http://files.seniorcenterwalkercounty.com/uploads/1/3/1/3/131380894/4887f3a20268909.pdf
    • http://files.loridanenberg.com/uploads/1/3/1/8/131857565/gurubofoxajane_zajadagopem.pdf
    • http://xedetit.nysra.org/uploads/1/3/0/7/130776257/janaguzotidavedod.pdf
    • http://files.crocusacademymainstreet.com/uploads/1/3/1/3/131379946/gabotukiselol.pdf
    • http://files.alleganygp.org/uploads/1/3/0/7/130775837/c77d3c707e74c54.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/56805684895.pdf
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/python_list_directory.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/zasipodezuboroduwafelene.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/16109256001.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/98688043417.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/pesagajopevisanigafawizur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/6224257242.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/cambridge_english_for_engineering_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6460/4310/files/19317234614.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/82822172982.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16994954809.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/22540841982.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_off000084f2.bin
89e28133e6caac162a8650fcb58efb928d127d0b2eb80bda3b45a38df85b12e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F2 5660 bytes
font_01_sfnt_off000097fc.bin
82fee1083caaacde14d130e5aa2c3fd15377ac9c8e5459a04632014c30519b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FC 10524 bytes

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