Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cccb18e687c810…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 00:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf9a7728c820dc8ab19d2ba3d647b3b5 SHA-1: 2ec3e6b6402449360c6c8a789be4fcf9f0dfc760 SHA-256: 39cccb18e687c81090586cab7dfb8526896ddeb570b645e37e9a854b96a0be36
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=simple+android+app+tutorial+for+beginners'. This URL is presented within the document body, disguised as a tutorial, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=simple+android+app+tutorial+for+beginners
    • http://files.heatherioneharding.com/uploads/1/3/1/0/131070688/bivope.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/acca_manual_j_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/bodomulegusorujulaxugowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/zibuxukasigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/free_twitter_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/92097711353.pdf
    • https://cdn.shopify.com/s/files/1/0462/7061/1613/files/fenuxuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/10155480840.pdf
    • https://cdn.shopify.com/s/files/1/0432/8774/0576/files/31583910888.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/agnisakshi_title_song_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/sigma_aldrich_katalog.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/ropeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/all_the_bright_places_jennifer_niven.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/3428715716.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_off00007082.bin
9902b8dfd2c2146496315fd323a28306dbbfddc732dc9d1be859f07c5e367903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 5604 bytes
font_01_sfnt_off00008367.bin
796a8516ab0fa847152b1d5689768328f324132622b15d8a492e702b7646a278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8367 10744 bytes

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