Malicious PDF — malware analysis report

Static analysis result for SHA-256 5746660732876800…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 17:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ecc950715598d39391e229c6423f0c SHA-1: 4e7539674802769c871618d7bc3cb791619b673c SHA-256: 5746660732876800451e061299cccc0334f34d9d1188c80b2afcd01324b709d0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=fusionner+les+pdf+en+un+document`. This URL is likely part of a phishing or scam campaign designed to lure users into clicking on it. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=fusionner+les+pdf+en+un+document
    • http://files.edermtest.com/uploads/1/3/1/4/131452922/rugiredarobi-jesodisilovozit.pdf
    • http://files.drjesalva.com/uploads/1/3/1/0/131070526/321ae60accf.pdf
    • http://files.rotterdamenglishspeakingtheatre.nl/uploads/1/3/1/4/131452735/dujigowalu_sewugumibafek_gomoxesorita_rutijoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/79931992559.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/8980177671.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/fenanewigoxolutaluge.pdf
    • https://cdn.shopify.com/s/files/1/0431/2340/9057/files/libobidefan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/ncert_maths_book_class_6_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/98513979173.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/gejutirijeguzamazimaxatut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15750122344.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/83610499801.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/zumuzikiweridifekovelebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/30779784236.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/biogas_dari_kotoran_kambing.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/namebazul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007061.bin
898d2dd9d5445ccbcbbbafeaf4e3e3e18b5d546c45c302f843a262f3de4584b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 5048 bytes
font_01_sfnt_off0000817e.bin
855f1bd8a569939d7f5222da74b7de53a5847ccc3cbe7347e834ad54c955df2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x817E 13120 bytes