Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37d2549cece4283…

MALICIOUS

PDF

59.0 KB Created: 2020-08-04 09:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7b7e0e3713f0c7a088072ad0de1d53 SHA-1: 3168e8fdff87259fbf3abd5c7c9ae66e4cd559ed SHA-256: e37d2549cece42838e3af5dd06038b1a01a3759895e79db1999c2bc8f31af5bf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'power amplifier schematic diagram'. This suggests a social engineering attack aiming to redirect users to malicious content. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=power+amplifier+schematic+diagram.+pdf
    • http://files.asapbis.com/uploads/1/3/0/9/130969254/fumerafimabakuxizu.pdf
    • http://files.criminallawyermissouri.com/uploads/1/3/1/4/131406202/9538189.pdf
    • http://files.eatsmartguides.com/uploads/1/3/1/4/131406082/nafefaduni.pdf
    • http://files.konstantinvalchev.com/uploads/1/3/0/8/130874478/jevafolag.pdf
    • http://files.i-kandytattoo.com/uploads/1/3/1/4/131437812/jubetufazum_tazuted_kuwajep.pdf
    • http://files.criminallawyermissouri.com/uploads/1/3/1/4/131406202/9538189
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/66160934676.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/wamajokodovutogujepabet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/what_are_twitch_raids.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/xakowexoguwufop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/pivozetijurelujaborarupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/36964554778.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/catecismo_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/suxenisojatez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/lodadozizaropawesanugakor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/xilukigifukukulipotujeluk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/noxokamemaluvupopofekibet.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_off00008dc1.bin
593023b0ecc420b6bf69e28d2df100ab2c3a19167b7562ed6044bf3b9941240b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC1 5376 bytes
font_01_sfnt_off0000a01a.bin
5920bff61f47d09f7a141c040056d06642e38112d44d579173ae2062a0059e9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA01A 15372 bytes
font_02_sfnt_off0000d0a3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 4324 bytes