Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e8217324168345…

MALICIOUS

PDF

122.9 KB Created: 2020-08-12 13:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38584eba91db75ff12baff928eba3fc7 SHA-1: 89b831cd65bfdb48b0881d3f1e1779c9cd8ee589 SHA-256: f6e8217324168345a4c35f2e86fcf70f3279b701b1c61fcc11e97eb73d1fe589
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, and specifically includes a critical redirector link to 'ttraff.cc'. This indicates a likely attempt to lure users to malicious content, possibly for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=mrunal%20economy%202020%20unacademy%20pdf
    • http://files.thebusinesscreditmovement.info/uploads/1/3/0/9/130969026/basoxadu-surekamu-kuborabejijuvow-fajasakan.pdf
    • http://files.chihongcasa.com/uploads/1/3/0/7/130739648/pesovalegumitev_ruveno.pdf
    • http://files.jimhoneygardens.com/uploads/1/3/1/3/131379552/5477895.pdf
    • http://gijoz.dstmilledgevillealumnae.org/uploads/1/3/1/6/131636725/sizuwikenejane.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/47297001233.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/19513734781.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/kisilijomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/77083918171.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/jozawafupabujisam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/adeste_fideles_noten_orgel.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/segewajot.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/1954_chevy_truck_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/zapem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/calendario_torneo_apertura_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a690.bin
9774cc486deda0720c3c6552323fb95e95108a2624be24e2cf1085a0d2bafe27		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA690 72968 bytes
font_00_sfnt_off00008922.bin
fe0edd4245e3a88928e5523ccdfb4f61e963394a6968c15618ece9e6a74e1d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8922 3040 bytes
font_01_sfnt_off000093e5.bin
6cb49fbbd9626f803bec68b86d54bdb51f2ce263bbc487e4da39602eb8733b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E5 5504 bytes
font_03_sfnt_off00016d6d.bin
862ffbaf354180e90c11906180ed7368e93acbb3e4e5cab97dd273db75aeaefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D6D 16388 bytes
font_04_sfnt_off0001a08f.bin
1e0e0f8255794213ea5e5c5441c6114865dc0b76f59be1920f03466381900683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A08F 18652 bytes
font_05_sfnt_off0001bd5e.bin
de587f67068d78e815e415cb82f357507478e232801f16da18e2442e1cf8eee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD5E 6948 bytes
font_06_sfnt_off0001d52f.bin
fc9aa48e79ccc6e0f914b4748175334026105657c0013aac1cfefd8d71ef0bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D52F 1748 bytes

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