Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0e76147d3f5d33…

MALICIOUS

PDF

58.5 KB Created: 2020-07-27 06:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c60ff162e047c666298b39a97e8f4cf5 SHA-1: 7ee2e286b5b4672903ae4f7e838bd2a4e85b3542 SHA-256: 1d0e76147d3f5d337e779db2c2b7c66f8a5a64f08942dea6b90333c95e638538
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm of 18 external PDF links, many hosted on Shopify, designed to appear as legitimate content. However, one of these links redirects to a known malicious domain, ttraff.com. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and does not provide clear textual lures.

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.com/pify?keyword=bhojpuri+gana+video++dj+wale
    • http://files.elementaryschoolcounseling.org/uploads/1/3/1/4/131408415/45bf2fcef4.pdf
    • http://files.atolsu.com/uploads/1/3/1/4/131406735/zunaluru-bazosisonu-pelapadaw-jijeraxej.pdf
    • http://files.filebankinc.com/uploads/1/3/1/8/131857338/2972644.pdf
    • http://files.clothdiaperproject.com/uploads/1/3/2/6/132695428/2874484.pdf
    • http://files.leighashleyfit.com/uploads/1/3/0/7/130740530/korifogekoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/tinekavegedefujon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/4354079579.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/63006212260.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/29661921964.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/zodawisogejisub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/juvedavadaxiri.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/mupol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/20068969760.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/29309197875.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/xupurapekaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/zepujowuwabodesobupir.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/vabuwukilufuregufefuse.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/32259069412.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c87.bin
63f2ed1663ba607b2e750b912e9e41feae07ee55d93ec2c45533beb311e2ecd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 5124 bytes
font_01_sfnt_off00008df0.bin
ae20008c60b92f3e24133ad5aafbb442f56672d061609818b2e157fb4f060901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF0 5308 bytes
font_02_sfnt_off0000a05b.bin
5271df6967f4247a51764a0d1324698a9f37b11d95b9cd40b9406b2c8c12325d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA05B 10688 bytes
font_03_sfnt_off0000c4f8.bin
b25e80d7407fadb3d0d0e61fe6b1dc122a938c45424a7e9245926067fca83b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F8 16680 bytes

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