Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e859fe68ecb3bb…

MALICIOUS

PDF

38.7 KB Created: 2020-08-22 08:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e3f1c910a3b877407901a63134c51f SHA-1: f20b1677a26457aeaf678ab22dc0a706ebddcb03 SHA-256: d5e859fe68ecb3bb032f132d406c5b808fd58572809281f567d50b654de57e79
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=accounting+principles+ifrs+version+global+edition+answers', is designed to lure users into clicking it under the guise of accounting information. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=accounting+principles+ifrs+version+global+edition+answers
    • http://files.carockart.org/uploads/1/3/0/8/130813979/32d65a0872d9814.pdf
    • http://gesexusas.gatewaytakanini.co.nz/uploads/1/3/0/7/130776418/winikul_tilir.pdf
    • http://files.fiddleheadmarina.com/uploads/1/3/1/4/131409526/zetij.pdf
    • http://files.newparanormalsociety.com/uploads/1/3/2/6/132680808/8bd2e7e.pdf
    • http://gabozib.sarahinscience.com/uploads/1/3/2/6/132696067/vojowemira_gopufigulowis_fulirawiro_magimeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/14881806235.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/67745281824.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/xumifefos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/zuxavunumadapewewebowar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/pijikawinajekurisezuzofo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/51793368552.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/pioneer_deh-_3400ub.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/kajurezafaxuxibekukopuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/10781337151.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/capture_one_pro_size.pdf
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/75185691671.pdf
    • https://cdn.shopify.com/s/files/1/0430/2539/9971/files/tuwiwazatufeduvijufok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8c.bin
b01ff6934e5fb18bddf0637029e1087e110424816b72101f7fa897cff273ddb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8C 5484 bytes
font_01_sfnt_off00005d4a.bin
75f442a8a0c73a89de1f191eca4bee90ca03a3a9fb1ce41943758e390c3d1821
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 9876 bytes
font_02_sfnt_off00007f27.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F27 4324 bytes