Malicious PDF — malware analysis report

Static analysis result for SHA-256 34db48cddfb7e441…

MALICIOUS

PDF

49.2 KB Created: 2020-08-07 07:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e943bbece299d6d17bf8092dcf7fb4 SHA-1: 3fa168b029f7cdb4203ea9820f7eac85b7755cbe SHA-256: 34db48cddfb7e441a33b7ea88b22e60a6e998c623709241316ab2457cc71fc6d
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The document body, though partially corrupted, contains text related to 'basic electronics components definitions pdf' and the malicious URL. The primary attack pattern involves luring users with a seemingly educational topic and then redirecting them to malicious infrastructure via a hidden link farm.

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=basic+electronics+components+definitions+pdf
    • http://files.taymun17.org/uploads/1/3/0/7/130775180/xujiwugadamevevojima.pdf
    • http://files.yogaforkidsportland.com/uploads/1/3/1/4/131437157/4a08df34.pdf
    • http://files.ebbandflowadventures.org/uploads/1/3/2/7/132712034/2432227.pdf
    • http://kigixu.wanjirunjoya.com/uploads/1/3/0/9/130969772/wipixif_joxanuwatuver_moruf_gimeloputag.pdf
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/halo_encyclopedia_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/7265715434.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/jurufesapodon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/guvakoniravi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3165/6605/files/95241851833.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/63532356392.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/red_cross_bls_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/12287098906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/ib_biology_review_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.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_off00007c87.bin
a688cdcc876a089cf10891d2d63128d0a0bdec0481f1c94ff53019b14129f9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 5348 bytes
font_01_sfnt_off00008e9c.bin
2ba565abb662efadf629801feee71c7dba19a42fbe90d448897979f3c1d1b5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9C 13000 bytes

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