Malicious PDF — malware analysis report

Static analysis result for SHA-256 54319b3216693fde…

MALICIOUS

PDF

47.8 KB Created: 2020-08-23 22:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd00e21ae2fb4d5419fc851016613d06 SHA-1: 22074812f7628a01a474fc7eb120ec69b407afe9 SHA-256: 54319b3216693fde2abe9fcb72ca734212028d8d72fa711e00c23e93e97721fc
152 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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many linking to external PDFs hosted on platforms like Shopify. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to lure users to malicious or SEO-abused content.

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.com/pify?keyword=poker+guide+hd+full+apk
    • http://files.krystlewong.com/uploads/1/3/1/4/131437669/kiwasutemumowod_rejeki.pdf
    • http://pokufaze.championsignsllc.net/uploads/1/3/2/6/132683014/2860774.pdf
    • http://files.traditionalspiritoutdoors.com/uploads/1/3/1/4/131437174/ffb435c2f7.pdf
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/crawford_county_ohio_sheriff_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/57342962089.pdf
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/taxovezafegajubifubugamap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/bristol_rovers_fixtures.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/51072704844.pdf
    • https://cdn.shopify.com/s/files/1/0451/1399/9512/files/possessive_nouns_worksheet_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/alphabet_matching_game.pdf
    • https://cdn.shopify.com/s/files/1/0448/1181/3015/files/77211343704.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/darksiders_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/pupuk_ampas_kopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.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_off00007cf1.bin
d5cec5aab831f42d279defbe5d9152dec2b8bc5cfab8855672237fe21d9dca92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF1 5188 bytes
font_01_sfnt_off00008e99.bin
cb12e8da7bc56395fdbbe847e12a0c35f08591935cf1e1a5f7359c41471d7242
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E99 10540 bytes