Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0afd4e01c600275…

MALICIOUS

PDF

47.9 KB Created: 2020-08-13 22:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21bc222fbfab10fcf4c527d5f762dff6 SHA-1: 6abc211d6821c60b3305faa15b56ee91312c4443 SHA-256: d0afd4e01c600275d63f5c3bd09c1f8ff5a5636dffb8e34b9d6051f3d7577a4d
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.com. Additionally, another critical heuristic detected a PDF link farm with numerous external links, many hosted on cdn.shopify.com. The document body contains text related to a calendar and includes the malicious URL, suggesting a lure to trick users into clicking on the embedded links. No scripts were extracted from this sample.

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=mahalaxmi+calendar+september+2019+marathi
    • http://files.laohnys.com/uploads/1/3/2/3/132303329/6994479.pdf
    • http://files.lunnsgardencenter.com/uploads/1/3/1/4/131454012/1459437.pdf
    • http://pepiwirev.freecoffeewithaubrey.com/uploads/1/3/0/8/130874655/kakisa_velefubijowefi.pdf
    • http://files.easttexaslocals.com/uploads/1/3/1/6/131606373/76fafe0430.pdf
    • http://files.nomadicsteve.com/uploads/1/3/1/4/131437538/42cb4690f8.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/pipovawitoroba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/towesapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/ucf_greek_rank.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/26285839902.pdf
    • https://cdn.shopify.com/s/files/1/0438/0151/0045/files/mexinekemoworozogewuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/1200981650.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/15504198776.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/47316736468.pdf
    • https://cdn.shopify.com/s/files/1/0450/9224/1560/files/pathology_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/7634775316.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/kilaxopanunuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/88979478244.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/64504999473.pdf
    • https://cdn.shopify.com/s/files/1/0438/6609/5781/files/92566590550.pdf
    • https://cdn.shopify.com/s/files/1/0447/0777/4618/files/free_sound._org.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_off000053a2.bin
ce6cf2d1f5a9a11174fa2d28a2cb6c602247665e6992bc1bdcada08eb3e18225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A2 6008 bytes
font_01_sfnt_off000067ea.bin
b3888430b1ed52dcdeee2f11c1db56001d2a3bcbee5db65e216c1e46819acd17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 9748 bytes
font_02_sfnt_off00008976.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 16164 bytes
font_03_sfnt_off00009ecb.bin
a0237da2ba6f7d0b862c21bbba5b6eb9f46d0a62d33dbf6d93c3da7886ced467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECB 5112 bytes

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