Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4b2c044f31f827…

MALICIOUS

PDF

46.0 KB Created: 2020-08-02 17:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 538ff5267be69fbc3b80123a2ba4a2c0 SHA-1: b2fb89a3710baea27d2a0fe63f5173af55864069 SHA-256: ef4b2c044f31f827c2c0aa859884722d95816112f1b29e7a7a12c34ce695f4f4
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=git+merge+conflict+tool'. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0438/0652/3552/files/pobajudibupuvamix.pdf' being the first identified. The document body also contains these URLs, suggesting a lure to click through to malicious content.

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=git+merge+conflict+tool
    • http://files.jackhammerwrestling.com/uploads/1/3/1/3/131398091/xeran.pdf
    • http://files.youfitplan.com/uploads/1/3/1/8/131871891/01e99.pdf
    • http://files.melindatuhus.net/uploads/1/3/0/7/130775970/ribufaximoz-fixigufelen-dapujab-damarorarepul.pdf
    • http://files.kristenwu.com/uploads/1/3/1/3/131380728/balinaropatinoj-sakito-xewigajikovixer.pdf
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/pobajudibupuvamix.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/64803957831.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/85970378463.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/votekojotux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/newonuxegagajugeranuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7108/files/tilosidof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/61603981135.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/lujos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/83827323436.pdf
    • https://cdn.shopify.com/s/files/1/0435/9864/3363/files/7112760797.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/bigej.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/90818306647.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_off00006503.bin
cff0ad563975b151427fb6702583020392e591560b3f727b8d1d806a7456a6ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6503 4632 bytes
font_01_sfnt_off000074ae.bin
c42b55d5a18b106231f19adc96a711e23fae45298e983c3135e7fc7bec183fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 12328 bytes
font_02_sfnt_off00009cc7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC7 4324 bytes