Malicious PDF — malware analysis report

Static analysis result for SHA-256 d195d8120b6f0770…

MALICIOUS

PDF

51.4 KB Created: 2020-08-09 14:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1378c4faeaec96d08a28d697a2876d33 SHA-1: e5df8483625604a584cc7fdcd2d56f9bf2c6c770 SHA-256: d195d8120b6f0770d089f48d3565001b25e851b89d1c20baef3dc7a4c41e804b
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external resources. The primary malicious link, https://ttraff.ru/pify?keyword=tabla+de+conversion+de+grados+fahrenheit+a+centigrados+pdf, is identified as a malicious redirector. The document body, though partially corrupted, contains text related to unit conversion, likely serving as a lure. The PDF structure and link farm indicate an attempt to drive traffic to malicious infrastructure.

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.ru/pify?keyword=tabla+de+conversion+de+grados+fahrenheit+a+centigrados+pdf
    • http://files.obxexotics.com/uploads/1/3/2/7/132712011/bufolozogeloroduwoke.pdf
    • http://files.pinnaclelinens.net/uploads/1/3/1/3/131383456/kunilifebogu_nevej_kubefenuxi_xipuxipanekez.pdf
    • http://ledefoto.thelevelupnetwork.com/uploads/1/3/2/8/132814930/883739.pdf
    • http://files.gatesgames.ca/uploads/1/3/0/7/130776110/vulederefasub.pdf
    • http://files.mtspokaneband.com/uploads/1/3/1/4/131438046/xajuga.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/banefedoregove.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/85896859808.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/30269906806.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/zolokuliwasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/93415200242.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5784/files/mumeviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/34214285085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2280/files/53489891550.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/jotujelatumakaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/16808609945.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_off000066fb.bin
08fbcbf43b79346e9c9d732340131458bad75faadb541d0ba5bb8112f6c5f120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5568 bytes
font_01_sfnt_off000079e5.bin
ce0086d1b3586ceebce9ddc5b3bd45b48c2460952f072d178b86d480f8785ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E5 14808 bytes
font_02_sfnt_off0000a76c.bin
010b481358c26d0a5883e2d349d104a8faee312f324d90e825e483d2a5ea3386		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA76C 16416 bytes

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