Malicious PDF — malware analysis report

Static analysis result for SHA-256 315cb6254878d34b…

MALICIOUS

PDF

73.7 KB Created: 2020-08-19 22:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c15595f928a1ab0665e3fe1f13073e SHA-1: a52f04f0dc81e4bb4df6d9ea217189ed71470e83 SHA-256: 315cb6254878d34bf391461873a525fd932be220786d640cf3b825ab0c0d7799
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One of the primary URLs, 'https://ttraff.ru/pify?keyword=ariston+channel+manual', is flagged as malicious. The document body, though heavily obfuscated, contains references to 'Ariston channel manual' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links also indicates a link farm strategy.

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=ariston+channel+manual
    • http://files.rosypetrova.online/uploads/1/3/1/8/131856649/lafexipuxivesexewoxi.pdf
    • http://files.candcstoneworks.com/uploads/1/3/1/8/131871729/wuwin.pdf
    • http://jeter.spasdffa.org/uploads/1/3/1/3/131380600/befawa-foken-wewepiwobepesi.pdf
    • http://pogelod.jillstarlingnovels.com/uploads/1/3/1/1/131164243/3872992.pdf
    • http://juzebe.gioiellisara.com/uploads/1/3/1/3/131380429/godutewus_miketuxanutefi_vugazevenu_bifazuwerugowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/allis_chalmers_forklift.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/64182776917.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/nenuzojowowiwulumuguxup.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7927/files/mowudovivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/datasheet_of_mosfet_irf540.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/wevelopufevixewubunegunub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/29941726684.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/artificial_language.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/17208267753.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/android_sdk_install_ubuntu_16._04.pdf
    • https://cdn.shopify.com/s/files/1/0435/4716/4826/files/antremanlarla_matematik_4_indir.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/bidetavitomefaxodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/tinumifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/58099591714.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_off0000c9c4.bin
8187301a4f89dc72d1938e4492494fa841041ed2a2a9bbe8e7564bb52537364c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C4 4912 bytes
font_01_sfnt_off0000da3a.bin
62fff868baf40e925061642a131d6054abb98b2f60fb81214dde717ffdc99650		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 15996 bytes
font_02_sfnt_off00010b23.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 4324 bytes

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