Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7999d844b6d8ac4…

MALICIOUS

PDF

60.0 KB Created: 2020-08-07 20:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5687c3e2bb2b4709cb9f76784bff5fe SHA-1: faac93520d064f077edc24463a57494657816239 SHA-256: e7999d844b6d8ac49e84f496a2bb9c41ba01c15fc2c731fcad794de10eb08b45
154 Risk Score

Malware Insights

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

The PDF contains a high number of links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.ru. This indicates a link farm or redirector strategy. The document body, though malformed, contains text related to a 'keto diet guide' and the malicious URL, suggesting a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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=keto+diet+guide+for+beginners+pdf
    • http://kofepona.rosaferrara.net/uploads/1/3/1/4/131453540/tofanavojazi-lirosorovexif-wulimudi-jufenanew.pdf
    • http://files.graceclt.com/uploads/1/3/1/8/131856919/361197.pdf
    • http://files.southamboyparade.com/uploads/1/3/1/6/131607544/012fb1bd69314cd.pdf
    • http://files.quitthecravings.com/uploads/1/3/0/9/130969971/6482753.pdf
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/xupetavufatira.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/60046413142.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/xinotelisikumuzujimuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/72429104947.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/99092708058.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/6356279738.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/cognitive_affective_and_psychomotor_domains_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/49052477482.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/dodofitabuwipigigisop.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_off0000a006.bin
91963ddab7d74c90a0c5631dced2c2390dc23242d85cc6a6107ffaed9800679b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA006 4960 bytes
font_01_sfnt_off0000b0f7.bin
4246d43df10791e4de67ef2c237e873ce90bbeffd434232f790843f04254705a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F7 10580 bytes
font_02_sfnt_off0000d51c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 4324 bytes

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