Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c96699970bd0c8…

MALICIOUS

PDF

63.2 KB Created: 2020-08-28 03:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6ee09866fb49b0a4c4de5d60598247 SHA-1: 85e469c7fcbf18b4381df05fab829d0774bb780d SHA-256: 29c96699970bd0c8aadbe8ed8366a1da21e58ce9db956327dc6949dd80803207
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/pify?keyword=trabajo+definicion+en+fisica, is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to further compromise. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=trabajo+definicion+en+fisica
    • http://files.gaualauf.com/uploads/1/3/0/7/130775192/gikawigadan_mosaga_kiremujijugu_gunejife.pdf
    • http://files.theblendwv.com/uploads/1/3/0/8/130813755/tumawir_betasexiravi_zowumud_wofenike.pdf
    • http://xijogum.jimmyzhan.ca/uploads/1/3/2/6/132696434/77884831.pdf
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdf
    • http://files.nirvanatails.net/uploads/1/3/0/7/130775557/dubujutisoz_wukabiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/kilipirar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/nidusipakowug.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/72284278054.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/favavuvagixefowenelutik.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/xokogabanutigafib.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/47146439702.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/34614635114.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/wondershareelement_ocr_portable.pdf
    • https://cdn.shopify.com/s/files/1/0436/9720/9498/files/72807369047.pdf
    • https://cdn.shopify.com/s/files/1/0447/4689/9607/files/21975910628.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/subject_verb_agreement_worksheet_with_answers.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_off0000869d.bin
e7c608e37e3083f1ac4382d8ff829e6fbca7b678270eba9d894d8fca408a37aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 4856 bytes
font_01_sfnt_off00009721.bin
064897eb3474bb51bba9d7e5f887b218f560fb7d20076e10e47632c33519cf0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9721 16880 bytes
font_02_sfnt_off0000caab.bin
1445775b9a23a908738d4b50a39a0185987e6b0dbf67120e278101207b724a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAB 16064 bytes
font_03_sfnt_off0000df4e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 4324 bytes

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