Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e90f892332678e2…

MALICIOUS

PDF

61.0 KB Created: 2020-08-10 12:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbdf18639bc68734861513f4b831e376 SHA-1: 7d940deb943d4ccac0baaae508126e0449a4c978 SHA-256: 3e90f892332678e2c3a6943d301637cb6ee2b9763eaa1aa75b1ca6ec72aa28f0
154 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, pointing to 'https://ttraff.com/pify?keyword=honda+hrv+2020+manual+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier also strongly flagged this PDF as malicious.

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=honda+hrv+2020+manual+pdf
    • http://files.emmasafe.com/uploads/1/3/1/3/131384229/wuligizopo.pdf
    • http://files.sbrolfing.com/uploads/1/3/1/0/131070009/rogowosewur.pdf
    • http://files.yoshikoeastvillage.com/uploads/1/3/1/8/131871462/16a056305.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/67646981316.pdf
    • https://cdn.shopify.com/s/files/1/0437/7739/2791/files/45218743347.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/75192155792.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/antagonismo_farmacologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/56801035880.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/tanaruwekoxajawogira.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/1896385007.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/1920138674.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/9431374910.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/53062985659.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_off00008647.bin
7706e72308cea353a4dc94b74beec13f1bec52e7adba4237f2f7c1077fff8df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 4020 bytes
font_01_sfnt_off0000947e.bin
3bed973a266cf266ab7adb5f27237c4adaaa904e34d20daef0f5a1a217381d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x947E 5396 bytes
font_02_sfnt_off0000a6b0.bin
fe0bb16d72efec8a36fd73bd8e1e19cc5f7f2123d0f78546abae26ac7a5c87ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B0 13500 bytes
font_03_sfnt_off0000d1d9.bin
2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D9 16060 bytes

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