Malicious PDF — malware analysis report

Static analysis result for SHA-256 9055fee665f32e8f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-15 20:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e277cb35619e8552de291d2db24a9b60 SHA-1: 603b7a721ea55e0e4e41ad45342a2efb27a0aea5 SHA-256: 9055fee665f32e8f4e90d19d2ca6ff5a089737d948dd626217c41480663d2c2b
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Hadithi za biblia pdf' which directs to the malicious URL. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content, a common tactic for distributing malicious documents.

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.ru/wb?keyword=hadithi%20za%20biblia%20pdf
    • http://files.ideaingramhills.com/uploads/1/3/1/4/131406036/nitenidomewofab.pdf
    • http://files.vintagebentonville.com/uploads/1/3/0/7/130775825/1251167.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/89969271212.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3751/files/subject_verb_agreement_worksheets_with_answers_10th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/asamardhuni_jeeva_yatra.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/torque_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/pebupuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5904/files/ozzy_osbourne_blizzard_of_ozz_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/26062094176.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/voltage_stabilizer_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/aptitude_test_sample_questions.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/64508160327.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/40860339797.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_off00004765.bin
82c84ae5d629ebb1785ea8f4b17c1317561d86a260b8a93bb8c0017d3037a5f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4765 2984 bytes
font_01_sfnt_off00005214.bin
46879db0e1820e87ca022be42419bceadc2f6f6be2be238d83411095862468f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5214 5008 bytes
font_02_sfnt_off0000631f.bin
0438b3eeee1cf2316b7315ea39a3acf6bc57f91dbdd6cb2bc45532636b573392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 9416 bytes
font_03_sfnt_off0000835d.bin
4fb18f2f8d176c0c9ddf893a3a69c6eaaaf8ae8309617b6e07033971a2ed751b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835D 16684 bytes

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