Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69e5ef9526b14a6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-07 02:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da2a8990b7656553d3a23da3a5c1c2e4 SHA-1: 7fad4182d1b152a03c0174b9534d6c9776fc9a04 SHA-256: c69e5ef9526b14a63d4fbbbb6f2747633616c3b75f0cca6c02de569f9427e667
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to appear as legitimate downloads. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is likely the ultimate destination for malicious payloads. The ML classifier strongly supports the malicious nature of this PDF.

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=mtg+biology+pdf+free+download
    • http://files.ibisregalia77.com/uploads/1/3/2/6/132680915/sijupakoji-mugopove-sukudixonol.pdf
    • http://juzuzujop.somedailyjoe.com/uploads/1/3/0/7/130738714/3691015.pdf
    • http://files.solivitarvclub.com/uploads/1/3/0/7/130738681/wixovamenuvazot_gubejowafofab_kizox_fumuberira.pdf
    • http://vazot.williampeskett.com/uploads/1/3/1/4/131437792/7024715.pdf
    • http://files.crmodelrepair.com/uploads/1/3/1/4/131406701/bekotobifomulezojoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/vesevoton.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/68540493891.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/38322920865.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/arresting_dress.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/adobe_flash_cs6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/17682508989.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/69723615260.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/negelowuminadijemede.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1482/files/one_in_a_million_gnr.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/tunagufurunivofo.pdf
    • https://cdn.shopify.com/s/files/1/0448/0414/5309/files/invention_of_printing_press.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/64370957388.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/56664018552.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047f3.bin
8df8ac7dfad2127dd0cf1451f8765ed5cc04aa4b2ea2f99bd3d93cc62bdd7c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F3 5160 bytes
font_01_sfnt_off000059a4.bin
6ef1527eb7da43b2f6436ead62110a10d51303d382445dbd23a9b6076f8172f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A4 4288 bytes
font_02_sfnt_off00006767.bin
899a90f37ce1209ec877b521fae87dac8fed9751e36843ada3c124d4b474ef0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 9048 bytes
font_03_sfnt_off00008641.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8641 4324 bytes

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