Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a38f4e3a0824a5…

MALICIOUS

PDF

53.0 KB Created: 2020-08-15 02:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935a3372a59add37a2c6a833382948bd SHA-1: e1e54ed306d44463cff16e3c7c7ff6840772e0f3 SHA-256: 20a38f4e3a0824a515e6af1dd064918b3bf93e99b3ab34e8ed27448306b51d70
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and a physics data sheet title, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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=a+level+physics+data+sheet+ocr
    • http://xuziboko.silvertonnaz.org/uploads/1/3/1/4/131437044/bizubexewef-jevama-nukevex-rijixegeju.pdf
    • http://files.vicarioustyle.com/uploads/1/3/1/6/131607544/9474343.pdf
    • http://files.andrewlock.us/uploads/1/3/2/3/132303035/daxafiwememutekudoku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/belajar_alif_ba_ta.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/53018115640.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/30756079674.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/42672647178.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/bawuzipiragab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/digigutasef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/sample_annotated_bibliography_apa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/56293282136.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9110/files/74084938118.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/xiladiwugirofabobuvesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/timoresojitepa.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_off00005bb3.bin
75e011763a174e4547f99cc5cd4b017d9bb3bc9cf5268a91f5b18b0a2b1ec8ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 4992 bytes
font_01_sfnt_off00006ccd.bin
6a83027898950ee5ecf9f322f895289404e756257b3fcdc29ffaec89a68aa66c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCD 16564 bytes
font_02_sfnt_off0000a12a.bin
d7709e750e85eacdbcc7e3559fbcbde8133123c52f0db8bc4c2249091d56af72
pdf-font-stream PDF embedded font (sfnt) at offset 0xA12A 16244 bytes
font_03_sfnt_off0000b696.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xB696 4324 bytes