Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6558d5dc4b96f45…

MALICIOUS

PDF

53.3 KB Created: 2020-08-21 23:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20563369eceaa954d06ffb72651cf52c SHA-1: 91af113dfc630271f5a518a94b5b992b2dbec631 SHA-256: b6558d5dc4b96f45f4fb96d7fe8bfcc39b219424cda698c1a68c5bd57b2d2368
154 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 features a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is 'wimawugiji.pdf'. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated but contains the same redirector URL.

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=xda+developers+android+tv+raspberry+pi
    • http://pogugobo.susantregoning.com/uploads/1/3/1/3/131398252/dosufi.pdf
    • http://dapebufub.powelloktoberfest.com/uploads/1/3/2/7/132740214/2a7bb.pdf
    • http://files.aerospectech.com/uploads/1/3/1/6/131606490/pizuz.pdf
    • http://files.corneliagerhardt.com/uploads/1/3/2/8/132814898/sadafigojevita.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/wimawugiji.pdf
    • https://cdn.shopify.com/s/files/1/0462/7208/6173/files/kittens_game_early_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/87541959466.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/53882637885.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/fugorigepapogejubatete.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/68270722373.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/xibojewaxufurimarazuzo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/spider_man_comic_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/96664529987.pdf
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/equations_of_state_for_fluids_and_fluid_mixtures.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/17887239586.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/25020191254.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/dudapegilug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/besutotipozas.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/
    • https://cdn.shopify.com/s/files/1/0429/8617/6665

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008207.bin
dcab5c42cab8c28e91ab643e9f66ccf2f130097eadf7b4ac84bcb9ec1dabf810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 5020 bytes
font_01_sfnt_off0000931c.bin
d089e1f1ddae752da5201fd405efdda8951f18634ba7457a08bcaa6f8601ceb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931C 11904 bytes
font_02_sfnt_off0000ba0e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0E 4324 bytes

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