Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc8f5a94711cf46…

MALICIOUS

PDF

49.7 KB Created: 2020-08-14 03:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 354771f9db3257366ae943f6eea4f2f8 SHA-1: 4aa8607554c430d9b6a520eef39db38d8bf4689c SHA-256: abc8f5a94711cf46099cac73a3f77ab812115ae80716c631ba255aa5b81bec13
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'daily project planner excel template'. This suggests a phishing or social engineering attack. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector confirms the intent to lead the user to harmful 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.cc/pify?keyword=daily+project+planner+excel+template
    • http://dewar.nativenerds.org/uploads/1/3/0/7/130739616/rimupamaz.pdf
    • http://files.downtownwestfieldassociation.com/uploads/1/3/1/6/131606027/bafakiwa-luseli-pozeba.pdf
    • http://files.phenixsalonwestdenver.com/uploads/1/3/0/7/130775098/xanakolekoweda-badobavuje-bugekutozijiz.pdf
    • http://files.nasrfoundation.org/uploads/1/3/1/4/131455825/efab7eb7f422df.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/15824933774.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0627/files/13711051727.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5175/files/94578428671.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/wigoleneterada.pdf
    • https://cdn.shopify.com/s/files/1/0434/9535/8624/files/10555623129.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6503/files/98313745574.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/sinimuxup.pdf
    • https://cdn.shopify.com/s/files/1/0449/2446/9415/files/limuzulajixoxazefew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/32146757426.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/calculus_early_transcendentals_7th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/trapping_rain_water_stack.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/silelipoxejapubisapaxufop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007912.bin
9e4f4d56db2870d186a38f8390eb45c40aab6d3e8357af9e83787f5f77f96693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 4932 bytes
font_01_sfnt_off000089cd.bin
6eac73cd175f4c65481d6554ca349beb1dbccaded23e84926a49f8ff8db76be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 9980 bytes
font_02_sfnt_off0000abf5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABF5 4324 bytes

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